Dear all, In specbond.dat, there are five entries. what meanings they are? 5 CYS SG 1 CYS SG 1 0.2 CYS2 CYS2 CYS SG 1 HEME FE 2 0.25 CYS2 HEME CYS SG 1 HEME CAB 1 0.2 CYS2 HEME CYS SG 1 HEME CAC 1 0.2 CYS2 HEME HIS NE2 1 HEME FE 1 0.2 HIS1 HEME I want to add special bond to specbond.dat.How can I do this , can you give me an example? Thanks in advance!