RESIDUE 2RA 15 CONECT C 3 O CA OXT CONECT N 3 CA H H2 CONECT O 1 C CONECT CA 4 C N CB HA CONECT CB 4 CA NG HB1 HB2 CONECT NG 3 CB HG1 HG2 CONECT OXT 2 C HXT CONECT H 1 N CONECT H2 1 N CONECT HA 1 CA CONECT HB1 1 CB CONECT HB2 1 CB CONECT HG1 1 NG CONECT HG2 1 NG CONECT HXT 1 OXT END HET 2RA 15 HETNAM 2RA 3-amino-D-alanine FORMUL 2RA C3 H8 N2 O2