RESIDUE THR 17 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 OG1 CG2 HB CONECT OG1 2 CB HG1 CONECT CG2 4 CB HG21 HG22 HG23 CONECT OXT 2 C HXT CONECT H 1 N CONECT H2 1 N CONECT HA 1 CA CONECT HB 1 CB CONECT HG1 1 OG1 CONECT HG21 1 CG2 CONECT HG22 1 CG2 CONECT HG23 1 CG2 CONECT HXT 1 OXT END HET THR 17 HETNAM THR THREONINE FORMUL THR C4 H9 N1 O3