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/ http://www.ebi.ac.uk/ ali-2020-1 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 Frontiers in immunology 2020 Only protein-protein interactions imex curation imex curation Coronavirus - Interactions investigated in the context of Coronavirus ali-2020-2 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 Frontiers in immunology 2020 Only protein-protein interactions imex curation imex curation Coronavirus - Interactions investigated in the context of Coronavirus 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 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 mannan mannan Mannan mannans Mannoglycan mannan small molecule small molecule chemical synthesis Chemical synthesis (Chemical synthesis) 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 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 albu_bovin Albumin ALB BSA protein protein bovin Bos taurus (Bovine) Bovine MKWVTFISLLLLFSSAYSRGVFRRDTHKSEIAHRFKDLGEEHFKGLVLIAFSQYLQQCPFDEHVKLVNELTEFAKTCVADESHAGCEKSLHTLFGDELCKVASLRETYGDMADCCEKQEPERNECFLSHKDDSPDLPKLKPDPNTLCDEFKADEKKFWGKYLYEIARRHPYFYAPELLYYANKYNGVFQECCQAEDKGACLLPKIETMREKVLASSARQRLRCASIQKFGERALKAWSVARLSQKFPKAEFVEVTKLVTDLTKVHKECCHGDLLECADDRADLAKYICDNQDTISSKLKECCDKPLLEKSHCIAEVEKDAIPENLPPLTADFAEDKDVCKNYQEAKDAFLGSFLYEYSRRHPEYAVSVLLRLAKEYEATLEECCAKDDPHACYSTVFDKLKHLVDEPQNLIKQNCDQFEKLGEYGFQNALIVRYTRKVPQVSTPTLVEVSRSLGKVGTRCCTKPESERMPCTEDYLSLILNRLCVLHEKTPVSEKVTKCCTESLVNRRPCFSALTPDETYVPKAFDEKLFTFHADICTLPDTEKQIKKQTALVELLKHKPKATEEQLKTVMENFVAFVDKCCAADDKEACFAVEGPKLVVSTQTALA col11_human Collectin-11 COLEC11 Collectin kidney protein 1 UNQ596/PRO1182 protein protein human Homo sapiens Human MRGNLALVGVLISLAFLSLLPSGHPQPAGDDACSVQILVPGLKGDAGEKGDKGAPGRPGRVGPTGEKGDMGDKGQKGSVGRHGKIGPIGSKGEKGDSGDIGPPGPNGEPGLPCECSQLRKAIGEMDNQVSQLTSELKFIKNAVAGVRETESKIYLLVKEEKRYADAQLSCQGRGGTLSMPKDEAANGLMAAYLAQAGLARVFIGINDLEKEGAFVYSDHSPMRTFNKWRSGEPNNAYDEEDCVEMVASGGWNDVACHTTMYFMCEFDKENM (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 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 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 n-mbl2-1 4074633 N/A 4074635 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum N/A 4074636 unspecified role unspecified role bait bait purified purified 9mamm mammals physical association physical association false false false 1A, number 1 s-mbl2-2 4074633 N/A 4074635 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum N/A 4074637 unspecified role unspecified role bait bait purified purified physical association physical association false false false 1A, number 3 Positive control n-mbl2-2 4074633 N/A 4074638 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum N/A 4074636 unspecified role unspecified role bait bait purified purified 9mamm mammals physical association physical association false false false 1B, number 1 s-mbl2-3 4074633 N/A 4074638 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum N/A 4074639 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 false 9mamm mammals physical association physical association false false false 1B, number 2 alb-fcn2-1 4074633 N/A 4074638 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum N/A 4074640 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 false bovin-serum Bovine serum serum Serum physical association physical association false false false 1B, number 3 Positive control n-colec11-1 4074633 N/A 4074641 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum N/A 4074636 unspecified role unspecified role bait bait purified purified 9mamm mammals physical association physical association false false false 1C, number 1 s-fcn2-1 4074633 N/A 4074641 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum N/A 4074639 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 false 9mamm mammals physical association physical association false false false 1C, number 2 (1_>3)_beta_d_glucan-fcn2-1 4074633 N/A 4074641 unspecified role unspecified role prey prey physiological level physiological level endogenous level endogenous endogenous endogenous level human-serum Homo sapiens serum Serum N/A 4074642 unspecified role unspecified role bait bait purified purified yeast Saccharomyces cerevisiae Baker's yeast physical association physical association false false false 1C, number 3 Positive control n-masp2-1 4074633 N/A 4074643 unspecified role unspecified role prey prey purified purified Sushi + protease domains sufficient to bind sufficient binding region sufficient to bind range range range range false ecoli Escherichia coli (strain K12) N/A 4074636 unspecified role unspecified role bait bait purified purified 9mamm mammals physical association physical association false false false 4A n-masp2-2 4074634 N/A 4074643 enzyme enzyme neutral component neutral component purified purified Sushi + protease domains sufficient to bind sufficient binding region sufficient to bind range range range range false ecoli Escherichia coli (strain K12) N/A 4074644 enzyme target enzyme target substrate substrate neutral component neutral component purified purified human-serum Homo sapiens serum Serum N/A 4074645 enzyme target enzyme target substrate substrate neutral component neutral component purified purified human-serum Homo sapiens serum Serum N/A 4074636 ancillary ancillary neutral component neutral component purified purified 9mamm mammals protein cleavage protein cleavage false false false 4B Addition of antibody HG4 inhibited MASP-2 mediated C4 cleavage.