RESIDUE XPC 19 CONECT N 3 CB HN HNA CONECT CB 4 N CG CA HB CONECT CG 4 CB ND HG HGA CONECT ND 3 CG CE HND CONECT CE 4 ND CA HE HEA CONECT CA 4 CB CE C HA CONECT C 3 CA O OXT CONECT O 1 C CONECT HN 1 N CONECT HB 1 CB CONECT HG 1 CG CONECT HGA 1 CG CONECT HND 1 ND CONECT HE 1 CE CONECT HEA 1 CE CONECT HA 1 CA CONECT HNA 1 N CONECT OXT 2 C HXT CONECT HXT 1 OXT END HET XPC 19 HETSYN XPC (3R,4S)-3-Aminopyrrolidine-4-carboxylic acid HETNAM XPC (3S,4R)-4-aminopyrrolidine-3-carboxylic acid FORMUL XPC C5 H10 N2 O2