RESIDUE 144 20 CONECT C1 4 N H11 H12 H13 CONECT N 4 C1 C2 C3 C4 CONECT C2 4 N O2 H21 H22 CONECT O2 2 C2 HO2 CONECT C3 4 N O3 H31 H32 CONECT O3 2 C3 HO3 CONECT C4 4 N O4 H41 H42 CONECT O4 2 C4 HO4 CONECT H11 1 C1 CONECT H12 1 C1 CONECT H13 1 C1 CONECT H21 1 C2 CONECT H22 1 C2 CONECT HO2 1 O2 CONECT H31 1 C3 CONECT H32 1 C3 CONECT HO3 1 O3 CONECT H41 1 C4 CONECT H42 1 C4 CONECT HO4 1 O4 END HET 144 20 HETNAM 144 TRIS-HYDROXYMETHYL-METHYL-AMMONIUM FORMUL 144 C4 H12 N1 O3 1+