RESIDUE MET 20 CONECT N 3 CA H H2 CONECT CA 4 N C CB HA CONECT C 3 CA O OXT CONECT O 1 C CONECT CB 4 CA CG HB2 HB3 CONECT CG 4 CB SD HG2 HG3 CONECT SD 2 CG CE CONECT CE 4 SD HE1 HE2 HE3 CONECT OXT 2 C HXT CONECT H 1 N CONECT H2 1 N CONECT HA 1 CA CONECT HB2 1 CB CONECT HB3 1 CB CONECT HG2 1 CG CONECT HG3 1 CG CONECT HE1 1 CE CONECT HE2 1 CE CONECT HE3 1 CE CONECT HXT 1 OXT END HET MET 20 HETNAM MET METHIONINE FORMUL MET C5 H11 N1 O2 S1