RESIDUE 42Y 22 CONECT N 3 CA H H2 CONECT CA 4 N CB C HA CONECT CB 4 CA OG H5 H6 CONECT OG 2 CB C1A CONECT C1A 3 OG OAC C2A CONECT OAC 1 C1A CONECT C2A 4 C1A C1 H7 H8 CONECT C 3 CA O OXT CONECT O 1 C CONECT C1 4 C2A H9 H10 H11 CONECT OXT 2 C HXT CONECT H 1 N CONECT H2 1 N CONECT HA 1 CA CONECT H5 1 CB CONECT H6 1 CB CONECT H7 1 C2A CONECT H8 1 C2A CONECT H9 1 C1 CONECT H10 1 C1 CONECT H11 1 C1 CONECT HXT 1 OXT END HET 42Y 22 HETNAM 42Y O-propanoyl-L-serine FORMUL 42Y C6 H11 N O4