RESIDUE 2AB 23 CONECT C1 4 C2 N9 H11 H12A CONECT C2 4 C1 C3 H21 H22 CONECT C3 3 C2 C4 C8 CONECT C4 3 C3 C5 H4 CONECT C5 3 C4 C6 H5 CONECT C6 3 C5 S10 C7 CONECT N9 3 C1 HN91 HN92 CONECT S10 3 C6 O12 O11 CONECT O12 2 S10 H12 CONECT O11 1 S10 CONECT C7 3 C6 C8 H7 CONECT C8 3 C3 C7 H8 CONECT H11 1 C1 CONECT H12A 1 C1 CONECT H21 1 C2 CONECT H22 1 C2 CONECT H4 1 C4 CONECT H5 1 C5 CONECT HN91 1 N9 CONECT HN92 1 N9 CONECT H12 1 O12 CONECT H7 1 C7 CONECT H8 1 C8 END HET 2AB 23 HETNAM 2AB 4-(2-AMINOETHYL)BENZENESULFONIC ACID FORMUL 2AB C8 H11 N1 O2 S1