RESIDUE HJT 20 CONECT CA 4 CB N C H1 CONECT CB 4 CA CG H2 H3 CONECT N 3 CA H4 H5 CONECT C 3 CA O OXT CONECT O 2 C H7 CONECT CG 4 CB S H8 H9 CONECT OXT 1 C CONECT O1S 1 S CONECT O2S 2 S H6 CONECT O3S 1 S CONECT S 4 CG O1S O2S O3S CONECT H1 1 CA CONECT H2 1 CB CONECT H3 1 CB CONECT H4 1 N CONECT H5 1 N CONECT H7 1 O CONECT H8 1 CG CONECT H9 1 CG CONECT H6 1 O2S END HET HJT 20 HETNAM HJT (2~{S})-2-azanyl-4-sulfo-butanoic acid FORMUL HJT C4 H9 N1 O5 S1