IntAct European Bioinformatics Institute IntAct intact http://www.ebi.ac.uk/ http://www.ebi.ac.uk/intact/query/${ac} EBI-[0-9]+|IA:[0-9]+ INTerAction database (IntAct) provides an open source database and toolkit for the storage, presentation and analysis of molecular interactions. http://www.ebi.ac.uk/intact European Bioinformatics Institute; Wellcome Trust Genome Campus; Hinxton, Cambridge; CB10 1SD; United Kingdom http://www.ebi.ac.uk/intact/ Lectin Pathway Mediates Complement Activation by SARS-CoV-2 Proteins. Lectin Pathway Mediates Complement Activation by SARS-CoV-2 Proteins. Frontiers in immunology 2020 imex curation Ali YM., Ferrari M., Lynch NJ., Yaseen S., Dudler T., Gragerov S., Demopulos G., Heeney JL., Schwaeble WJ. Virus - Publications including interactions involving viral proteins Coronavirus - Interactions investigated in the context of Coronavirus myima2@cam.ac.uk Only protein-protein interactions imex curation in vitro In vitro protease assay protease assay weight by comassie molecular weight estimation by coomasie staining weight by comassie Ali YM., Ferrari M., Lynch NJ., Yaseen S., Dudler T., Gragerov S., Demopulos G., Heeney JL., Schwaeble WJ. Virus - Publications including interactions involving viral proteins myima2@cam.ac.uk Accepted 2021-SEP-27 AT 14:39 BST AT 14:39 BST by ORCHARD Frontiers in immunology 2020 Only protein-protein interactions imex curation imex curation Lectin Pathway Mediates Complement Activation by SARS-CoV-2 Proteins. Lectin Pathway Mediates Complement Activation by SARS-CoV-2 Proteins. Frontiers in immunology 2020 imex curation Ali YM., Ferrari M., Lynch NJ., Yaseen S., Dudler T., Gragerov S., Demopulos G., Heeney JL., Schwaeble WJ. Virus - Publications including interactions involving viral proteins Coronavirus - Interactions investigated in the context of Coronavirus myima2@cam.ac.uk Only protein-protein interactions imex curation in vitro In vitro elisa enzyme linked immunosorbent assay ELISA ELISA elisa antibody detection identification by antibody antibody detection Ali YM., Ferrari M., Lynch NJ., Yaseen S., Dudler T., Gragerov S., Demopulos G., Heeney JL., Schwaeble WJ. Virus - Publications including interactions involving viral proteins myima2@cam.ac.uk Accepted 2021-SEP-27 AT 14:39 BST AT 14:39 BST by ORCHARD Frontiers in immunology 2020 Only protein-protein interactions imex curation imex curation co4a_human Complement C4-A C4A CO4 CPAMD2 Acidic complement C4 C3 and PZP-like alpha-2-macroglobulin domain-containing protein 2 protein protein human Homo sapiens Human MRLLWGLIWASSFFTLSLQKPRLLLFSPSVVHLGVPLSVGVQLQDVPRGQVVKGSVFLRNPSRNNVPCSPKVDFTLSSERDFALLSLQVPLKDAKSCGLHQLLRGPEVQLVAHSPWLKDSLSRTTNIQGINLLFSSRRGHLFLQTDQPIYNPGQRVRYRVFALDQKMRPSTDTITVMVENSHGLRVRKKEVYMPSSIFQDDFVIPDISEPGTWKISARFSDGLESNSSTQFEVKKYVLPNFEVKITPGKPYILTVPGHLDEMQLDIQARYIYGKPVQGVAYVRFGLLDEDGKKTFFRGLESQTKLVNGQSHISLSKAEFQDALEKLNMGITDLQGLRLYVAAAIIESPGGEMEEAELTSWYFVSSPFSLDLSKTKRHLVPGAPFLLQALVREMSGSPASGIPVKVSATVSSPGSVPEVQDIQQNTDGSGQVSIPIIIPQTISELQLSVSAGSPHPAIARLTVAAPPSGGPGFLSIERPDSRPPRVGDTLNLNLRAVGSGATFSHYYYMILSRGQIVFMNREPKRTLTSVSVFVDHHLAPSFYFVAFYYHGDHPVANSLRVDVQAGACEGKLELSVDGAKQYRNGESVKLHLETDSLALVALGALDTALYAAGSKSHKPLNMGKVFEAMNSYDLGCGPGGGDSALQVFQAAGLAFSDGDQWTLSRKRLSCPKEKTTRKKRNVNFQKAINEKLGQYASPTAKRCCQDGVTRLPMMRSCEQRAARVQQPDCREPFLSCCQFAESLRKKSRDKGQAGLQRALEILQEEDLIDEDDIPVRSFFPENWLWRVETVDRFQILTLWLPDSLTTWEIHGLSLSKTKGLCVATPVQLRVFREFHLHLRLPMSVRRFEQLELRPVLYNYLDKNLTVSVHVSPVEGLCLAGGGGLAQQVLVPAGSARPVAFSVVPTAAAAVSLKVVARGSFEFPVGDAVSKVLQIEKEGAIHREELVYELNPLDHRGRTLEIPGNSDPNMIPDGDFNSYVRVTASDPLDTLGSEGALSPGGVASLLRLPRGCGEQTMIYLAPTLAASRYLDKTEQWSTLPPETKDHAVDLIQKGYMRIQQFRKADGSYAAWLSRDSSTWLTAFVLKVLSLAQEQVGGSPEKLQETSNWLLSQQQADGSFQDPCPVLDRSMQGGLVGNDETVALTAFVTIALHHGLAVFQDEGAEPLKQRVEASISKANSFLGEKASAGLLGAHAAAITAYALTLTKAPVDLLGVAHNNLMAMAQETGDNLYWGSVTGSQSNAVSPTPAPRNPSDPMPQAPALWIETTAYALLHLLLHEGKAEMADQASAWLTRQGSFQGGFRSTQDTVIALDALSAYWIASHTTEERGLNVTLSSTGRNGFKSHALQLNNRQIRGLEEELQFSLGSKINVKVGGNSKGTLKVLRTYNVLDMKNTTCQDLQIEVTVKGHVEYTMEANEDYEDYEYDELPAKDDPDAPLQPVTPLQLFEGRRNRRRREAPKVVEEQESRVHYTVCIWRNGKVGLSGMAIADVTLLSGFHALRADLEKLTSLSDRYVSHFETEGPHVLLYFDSVPTSRECVGFEAVQEVPVGLVQPASATLYDYYNPERRCSVFYGAPSKSRLLATLCSAEVCQCAEGKCPRQRRALERGLQDEDGYRMKFACYYPRVEYGFQVKVLREDSRAAFRLFETKITQVLHFTKDVKAAANQMRNFLVRASCRLRLEPGKEYLIMGLDGATYDLEGHPQYLLDSNSWIEEMPSERLCRSTRQRAACAQLNDFLQEYGTQGCQV 9396A4CC4DA3602C ncap_sars2 Nucleoprotein N Nucleocapsid protein protein protein SARS-CoV-2 SARS-CoV-2 SARS-CoV-2 Severe acute respiratory syndrome coronavirus 2 2019-nCoV MSDNGPQNQRNAPRITFGGPSDSTGSNQNGERSGARSKQRRPQGLPNNTASWFTALTQHGKEDLKFPRGQGVPINTNSSPDDQIGYYRRATRRIRGGDGKMKDLSPRWYFYYLGTGPEAGLPYGANKDGIIWVATEGALNTPKDHIGTRNPANNAAIVLQLPQGTTLPKGFYAEGSRGGSQASSRSSSRSRNSSRNSTPGSSRGTSPARMAGNGGDAALALLLLDRLNQLESKMSGKGQQQQGQTVTKKSAAEASKKPRQKRTATKAYNVTQAFGRRGPEQTQGNFGDQELIRQGTDYKHWPQIAQFAPSASAFFGMSRIGMEVTPSGTWLTYTGAIKLDDKDPNFKDQVILLNKHIDAYKTFPPTEPKKDKKKKADETQALPQRQKKQQTVTLLPAADLDDFSKQLQQSMSSADSTQA co4b_human Complement C4-B C4B C4B_2 Basic complement C4 C3 and PZP-like alpha-2-macroglobulin domain-containing protein 3 CO4 CPAMD3 protein protein human Homo sapiens Human MRLLWGLIWASSFFTLSLQKPRLLLFSPSVVHLGVPLSVGVQLQDVPRGQVVKGSVFLRNPSRNNVPCSPKVDFTLSSERDFALLSLQVPLKDAKSCGLHQLLRGPEVQLVAHSPWLKDSLSRTTNIQGINLLFSSRRGHLFLQTDQPIYNPGQRVRYRVFALDQKMRPSTDTITVMVENSHGLRVRKKEVYMPSSIFQDDFVIPDISEPGTWKISARFSDGLESNSSTQFEVKKYVLPNFEVKITPGKPYILTVPGHLDEMQLDIQARYIYGKPVQGVAYVRFGLLDEDGKKTFFRGLESQTKLVNGQSHISLSKAEFQDALEKLNMGITDLQGLRLYVAAAIIESPGGEMEEAELTSWYFVSSPFSLDLSKTKRHLVPGAPFLLQALVREMSGSPASGIPVKVSATVSSPGSVPEVQDIQQNTDGSGQVSIPIIIPQTISELQLSVSAGSPHPAIARLTVAAPPSGGPGFLSIERPDSRPPRVGDTLNLNLRAVGSGATFSHYYYMILSRGQIVFMNREPKRTLTSVSVFVDHHLAPSFYFVAFYYHGDHPVANSLRVDVQAGACEGKLELSVDGAKQYRNGESVKLHLETDSLALVALGALDTALYAAGSKSHKPLNMGKVFEAMNSYDLGCGPGGGDSALQVFQAAGLAFSDGDQWTLSRKRLSCPKEKTTRKKRNVNFQKAINEKLGQYASPTAKRCCQDGVTRLPMMRSCEQRAARVQQPDCREPFLSCCQFAESLRKKSRDKGQAGLQRALEILQEEDLIDEDDIPVRSFFPENWLWRVETVDRFQILTLWLPDSLTTWEIHGLSLSKTKGLCVATPVQLRVFREFHLHLRLPMSVRRFEQLELRPVLYNYLDKNLTVSVHVSPVEGLCLAGGGGLAQQVLVPAGSARPVAFSVVPTAATAVSLKVVARGSFEFPVGDAVSKVLQIEKEGAIHREELVYELNPLDHRGRTLEIPGNSDPNMIPDGDFNSYVRVTASDPLDTLGSEGALSPGGVASLLRLPRGCGEQTMIYLAPTLAASRYLDKTEQWSTLPPETKDHAVDLIQKGYMRIQQFRKADGSYAAWLSRGSSTWLTAFVLKVLSLAQEQVGGSPEKLQETSNWLLSQQQADGSFQDLSPVIHRSMQGGLVGNDETVALTAFVTIALHHGLAVFQDEGAEPLKQRVEASISKASSFLGEKASAGLLGAHAAAITAYALTLTKAPADLRGVAHNNLMAMAQETGDNLYWGSVTGSQSNAVSPTPAPRNPSDPMPQAPALWIETTAYALLHLLLHEGKAEMADQAAAWLTRQGSFQGGFRSTQDTVIALDALSAYWIASHTTEERGLNVTLSSTGRNGFKSHALQLNNRQIRGLEEELQFSLGSKINVKVGGNSKGTLKVLRTYNVLDMKNTTCQDLQIEVTVKGHVEYTMEANEDYEDYEYDELPAKDDPDAPLQPVTPLQLFEGRRNRRRREAPKVVEEQESRVHYTVCIWRNGKVGLSGMAIADVTLLSGFHALRADLEKLTSLSDRYVSHFETEGPHVLLYFDSVPTSRECVGFEAVQEVPVGLVQPASATLYDYYNPERRCSVFYGAPSKSRLLATLCSAEVCQCAEGKCPRQRRALERGLQDEDGYRMKFACYYPRVEYGFQVKVLREDSRAAFRLFETKITQVLHFTKDVKAAANQMRNFLVRASCRLRLEPGKEYLIMGLDGATYDLEGHPQYLLDSNSWIEEMPSERLCRSTRQRAACAQLNDFLQEYGTQGCQV E724B85F7FA673C5 mbl2_human Mannose-binding protein C MBL2 COLEC1 MBL Collectin-1 MBP1 Mannan-binding protein Mannose-binding lectin protein protein human Homo sapiens Human MSLFPSLPLLLLSMVAASYSETVTCEDAQKTCPAVIACSSPGINGFPGKDGRDGTKGEKGEPGQGLRGLQGPPGKLGPPGNPGPSGSPGPKGQKGDPGKSPDGDSSLAASERKALQTEMARIKKWLTFSLGKQVGNKFFLTNGEIMTFEKVKALCVKFQASVATPRNAAENGAIQNLIKEEAFLGITDEKTEGQFVDLTGNRLTYTNWNEGEPNNAGSDEDCVLLLKNGQWNDVPCSTSHLAVCEFPI DIP protein P11226 original sequence version: 181 C1F2AAED46D0F774 spike_sars2 Spike glycoprotein S E2 Peplomer protein 2 protein protein SARS-CoV-2 SARS-CoV-2 SARS-CoV-2 Severe acute respiratory syndrome coronavirus 2 2019-nCoV MFVFLVLLPLVSSQCVNLTTRTQLPPAYTNSFTRGVYYPDKVFRSSVLHSTQDLFLPFFSNVTWFHAIHVSGTNGTKRFDNPVLPFNDGVYFASTEKSNIIRGWIFGTTLDSKTQSLLIVNNATNVVIKVCEFQFCNDPFLGVYYHKNNKSWMESEFRVYSSANNCTFEYVSQPFLMDLEGKQGNFKNLREFVFKNIDGYFKIYSKHTPINLVRDLPQGFSALEPLVDLPIGINITRFQTLLALHRSYLTPGDSSSGWTAGAAAYYVGYLQPRTFLLKYNENGTITDAVDCALDPLSETKCTLKSFTVEKGIYQTSNFRVQPTESIVRFPNITNLCPFGEVFNATRFASVYAWNRKRISNCVADYSVLYNSASFSTFKCYGVSPTKLNDLCFTNVYADSFVIRGDEVRQIAPGQTGKIADYNYKLPDDFTGCVIAWNSNNLDSKVGGNYNYLYRLFRKSNLKPFERDISTEIYQAGSTPCNGVEGFNCYFPLQSYGFQPTNGVGYQPYRVVVLSFELLHAPATVCGPKKSTNLVKNKCVNFNFNGLTGTGVLTESNKKFLPFQQFGRDIADTTDAVRDPQTLEILDITPCSFGGVSVITPGTNTSNQVAVLYQDVNCTEVPVAIHADQLTPTWRVYSTGSNVFQTRAGCLIGAEHVNNSYECDIPIGAGICASYQTQTNSPRRARSVASQSIIAYTMSLGAENSVAYSNNSIAIPTNFTISVTTEILPVSMTKTSVDCTMYICGDSTECSNLLLQYGSFCTQLNRALTGIAVEQDKNTQEVFAQVKQIYKTPPIKDFGGFNFSQILPDPSKPSKRSFIEDLLFNKVTLADAGFIKQYGDCLGDIAARDLICAQKFNGLTVLPPLLTDEMIAQYTSALLAGTITSGWTFGAGAALQIPFAMQMAYRFNGIGVTQNVLYENQKLIANQFNSAIGKIQDSLSSTASALGKLQDVVNQNAQALNTLVKQLSSNFGAISSVLNDILSRLDKVEAEVQIDRLITGRLQSLQTYVTQQLIRAAEIRASANLAATKMSECVLGQSKRVDFCGKGYHLMSFPQSAPHGVVFLHVTYVPAQEKNFTTAPAICHDGKAHFPREGVFVSNGTHWFVTQRNFYEPQIITTDNTFVSGNCDVVIGIVNNTVYDPLQPELDSFKEELDKYFKNHTSPDVDLGDISGINASVVNIQKEIDRLNEVAKNLNESLIDLQELGKYEQYIKWPWYIWLGFIAGLIAIVMVTIMLCCMTSCCSCLKGCCSCGSCCKFDEDDSEPVLKGVKLHYT fcn2_human Ficolin-2 FCN2 FCNL Ficolin-B Ficolin-beta L-ficolin Collagen/fibrinogen domain-containing protein 2 Serum lectin p35 37 kDa elastin-binding protein EBP-37 Hucolin protein protein human Homo sapiens Human MELDRAVGVLGAATLLLSFLGMAWALQAADTCPEVKMVGLEGSDKLTILRGCPGLPGAPGPKGEAGTNGKRGERGPPGPPGKAGPPGPNGAPGEPQPCLTGPRTCKDLLDRGHFLSGWHTIYLPDCRPLTVLCDMDTDGGGWTVFQRRVDGSVDFYRDWATYKQGFGSRLGEFWLGNDNIHALTAQGTSELRVDLVDFEDNYQFAKYRSFKVADEAEKYNLVLGAFVEGSAGDSLTFHNNQSFSTKDQDNDLNTGNCAVMFQGAWWYKNCHVSNLNGRYLRGTHGSFANGINWKSGKGYNYSYKVSEMKVRPA mint Calcium-dependent and GlcNAc-binding lectin. Enhanced phagocytosis of S.typhimurium by neutrophils, suggesting an opsonic effect via the collagen region D363029846CCB3C9 col11_human Collectin-11 COLEC11 Collectin kidney protein 1 UNQ596/PRO1182 protein protein human Homo sapiens Human MRGNLALVGVLISLAFLSLLPSGHPQPAGDDACSVQILVPGLKGDAGEKGDKGAPGRPGRVGPTGEKGDMGDKGQKGSVGRHGKIGPIGSKGEKGDSGDIGPPGPNGEPGLPCECSQLRKAIGEMDNQVSQLTSELKFIKNAVAGVRETESKIYLLVKEEKRYADAQLSCQGRGGTLSMPKDEAANGLMAAYLAQAGLARVFIGINDLEKEGAFVYSDHSPMRTFNKWRSGEPNNAYDEEDCVEMVASGGWNDVACHTTMYFMCEFDKENM A14A248CE41DB340 albu_bovin Albumin ALB BSA protein protein bovin Bos taurus (Bovine) Bovine MKWVTFISLLLLFSSAYSRGVFRRDTHKSEIAHRFKDLGEEHFKGLVLIAFSQYLQQCPFDEHVKLVNELTEFAKTCVADESHAGCEKSLHTLFGDELCKVASLRETYGDMADCCEKQEPERNECFLSHKDDSPDLPKLKPDPNTLCDEFKADEKKFWGKYLYEIARRHPYFYAPELLYYANKYNGVFQECCQAEDKGACLLPKIETMREKVLASSARQRLRCASIQKFGERALKAWSVARLSQKFPKAEFVEVTKLVTDLTKVHKECCHGDLLECADDRADLAKYICDNQDTISSKLKECCDKPLLEKSHCIAEVEKDAIPENLPPLTADFAEDKDVCKNYQEAKDAFLGSFLYEYSRRHPEYAVSVLLRLAKEYEATLEECCAKDDPHACYSTVFDKLKHLVDEPQNLIKQNCDQFEKLGEYGFQNALIVRYTRKVPQVSTPTLVEVSRSLGKVGTRCCTKPESERMPCTEDYLSLILNRLCVLHEKTPVSEKVTKCCTESLVNRRPCFSALTPDETYVPKAFDEKLFTFHADICTLPDTEKQIKKQTALVELLKHKPKATEEQLKTVMENFVAFVDKCCAADDKEACFAVEGPKLVVSTQTALA 39167DFE768585D4 mannan mannan Mannan mannans Mannoglycan mannan small molecule small molecule chemical synthesis Chemical synthesis (Chemical synthesis) (1->3)-beta-d-glucan (1->3)-beta-D-glucan (1,3-beta-D-glucosyl)n (1,3-beta-D-Glucosyl)n (1,3-beta-D-Glucosyl)n+1 (1,3-beta-D-Glucosyl)n-1 1,3-beta-D-Glucan 1,3-beta-Glucan beta-(1,3)-glucan beta-1,3-glucan callose curdlan zymosan (1->3)-beta-D-glucopyranan small molecule small molecule chemical synthesis Chemical synthesis (Chemical synthesis) masp2_human Mannan-binding lectin serine protease 2 MASP2 Mannose-binding protein-associated serine protease 2 MBL-associated serine protease 2 protein protein human Homo sapiens Human MRLLTLLGLLCGSVATPLGPKWPEPVFGRLASPGFPGEYANDQERRWTLTAPPGYRLRLYFTHFDLELSHLCEYDFVKLSSGAKVLATLCGQESTDTERAPGKDTFYSLGSSLDITFRSDYSNEKPFTGFEAFYAAEDIDECQVAPGEAPTCDHHCHNHLGGFYCSCRAGYVLHRNKRTCSALCSGQVFTQRSGELSSPEYPRPYPKLSSCTYSISLEEGFSVILDFVESFDVETHPETLCPYDFLKIQTDREEHGPFCGKTLPHRIETKSNTVTITFVTDESGDHTGWKIHYTSTAQPCPYPMAPPNGHVSPVQAKYILKDSFSIFCETGYELLQGHLPLKSFTAVCQKDGSWDRPMPACSIVDCGPPDDLPSGRVEYITGPGVTTYKAVIQYSCEETFYTMKVNDGKYVCEADGFWTSSKGEKSLPVCEPVCGLSARTTGGRIYGGQKAKPGDFPWQVLILGGTTAAGALLYDNWVLTAAHAVYEQKHDASALDIRMGTLKRLSPHYTQAWSEAVFIHEGYTHDAGFDNDIALIKLNNKVVINSNITPICLPRKEAESFMRTDDIGTASGWGLTQRGFLARNLMYVDIPIVDHQKCTAAYEKPPYPRGSVTANMLCAGLESGGKDSCRGDSGGALVFLDSETERWFVGGIVSWGSMNCGEAGQYGVYTKVINYIPWIENIISDF mint ED952085FA115E21 n-mbl2-1 2 6 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum 4 unspecified role unspecified role bait bait purified purified 9mamm mammals physical association physical association 1A, number 1 s-mbl2-2 2 6 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum 11 unspecified role unspecified role bait bait purified purified physical association physical association 1A, number 3 Positive control n-mbl2-2 2 8 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum 4 unspecified role unspecified role bait bait purified purified 9mamm mammals physical association physical association 1B, number 1 s-mbl2-3 2 8 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum 7 unspecified role unspecified role bait bait purified purified region his tag his tag Hexa-His-tag 6-His-tag Histidine-tag Hexa-His-tag Histidine-tag 6-His-tag undetermined undetermined sequence position undetermined undetermined undetermined sequence position undetermined 9mamm mammals physical association physical association 1B, number 2 alb-fcn2-1 2 8 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum 10 unspecified role unspecified role bait bait purified purified region ac1res monoacetylated residue Acetyl Acetylation (N terminus, N epsilon of Lysine, O of Serine) (Ac) Acetylation Ac1Res undetermined undetermined sequence position undetermined undetermined undetermined sequence position undetermined bovin-serum Bovine serum serum Serum physical association physical association 1B, number 3 Positive control n-colec11-1 2 9 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum 4 unspecified role unspecified role bait bait purified purified 9mamm mammals physical association physical association 1C, number 1 s-fcn2-1 2 9 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum 7 unspecified role unspecified role bait bait purified purified region his tag his tag Hexa-His-tag 6-His-tag Histidine-tag Hexa-His-tag Histidine-tag 6-His-tag undetermined undetermined sequence position undetermined undetermined undetermined sequence position undetermined 9mamm mammals physical association physical association 1C, number 2 (1_>3)_beta_d_glucan-fcn2-1 2 9 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum 12 unspecified role unspecified role bait bait purified purified yeast Saccharomyces cerevisiae Baker's yeast physical association physical association 1C, number 3 Positive control n-masp2-1 2 13 unspecified role unspecified role prey prey purified purified Sushi + protease domains sufficient to bind sufficient binding region sufficient to bind range range range range ecoli Escherichia coli (strain K12) 4 unspecified role unspecified role bait bait purified purified 9mamm mammals physical association physical association 4A n-masp2-2 1 13 enzyme enzyme neutral component neutral component purified purified Sushi + protease domains sufficient to bind sufficient binding region sufficient to bind range range range range ecoli Escherichia coli (strain K12) 5 enzyme target enzyme target substrate substrate neutral component neutral component purified purified human-serum Homo sapiens serum Serum 3 enzyme target enzyme target substrate substrate neutral component neutral component purified purified human-serum Homo sapiens serum Serum 4 ancillary ancillary neutral component neutral component purified purified 9mamm mammals protein cleavage protein cleavage 4B Addition of antibody HG4 inhibited MASP-2 mediated C4 cleavage.