RESIDUE 12A 58 CONECT OP3 2 P HOP3 CONECT P 4 OP3 OP1 OP2 O5' CONECT OP1 1 P CONECT OP2 2 P HOP2 CONECT O5' 2 P C5' CONECT C5' 4 O5' C4' H5' H5'' CONECT C4' 4 C5' O4' C3' H4' CONECT O4' 2 C4' C1' CONECT C3' 4 C4' O3' C2' H3' CONECT O3' 2 C3' HO3' CONECT C2' 4 C3' O2' C1' H2' CONECT O2' 2 C2' HO2' CONECT C1' 4 O4' C2' N9 H1' CONECT N9 3 C1' C8 C4 CONECT C8 3 N9 N7 H8 CONECT N7 2 C8 C5 CONECT C5 3 N7 C6 C4 CONECT C6 3 C5 N6 N1 CONECT N6 3 C6 CC HN6 CONECT N1 2 C6 C2 CONECT C2 3 N1 N3 S2 CONECT N3 2 C2 C4 CONECT C4 3 N9 C5 N3 CONECT S2 2 C2 C2M CONECT C2M 4 S2 H2M1 H2M2 H2M3 CONECT CC 3 N6 OO N CONECT OO 1 CC CONECT N 3 CC CA H CONECT CA 4 N C CB HA CONECT C 3 CA O OXT CONECT O 1 C CONECT OXT 2 C HXT CONECT CB 4 CA OG1 CG2 HB CONECT OG1 2 CB HG1 CONECT CG2 4 CB HG21 HG22 HG23 CONECT HOP3 1 OP3 CONECT HOP2 1 OP2 CONECT H5' 1 C5' CONECT H5'' 1 C5' CONECT H4' 1 C4' CONECT H3' 1 C3' CONECT HO3' 1 O3' CONECT H2' 1 C2' CONECT HO2' 1 O2' CONECT H1' 1 C1' CONECT H8 1 C8 CONECT HN6 1 N6 CONECT H2M1 1 C2M CONECT H2M2 1 C2M CONECT H2M3 1 C2M CONECT H 1 N CONECT HA 1 CA CONECT HXT 1 OXT CONECT HB 1 CB CONECT HG1 1 OG1 CONECT HG21 1 CG2 CONECT HG22 1 CG2 CONECT HG23 1 CG2 END HET 12A 58 HETNAM 12A 2-METHYLTHIO-N6-(AMINOCARBONYL-L-THREONYL)-ADENOSINE-5' HETNAM 2 12A -MONOPHOSPHATE FORMUL 12A C16 H23 N6 O11 P1 S1