Chains and heterogens:
PDB Chain Sequences:
>1bx9A (A:) agikvfghpasiatrrvlialheknldfelvhvelkdgehkkepflsrnpfgqvpafedg dlklfesraitqyiahryenqgtnllqtdsknisqyaimaigmqvedhqfdpvasklafe qifksiyglttdeavvaeeeaklakvldvyearlkefkylagetftltdlhhipaiqyll gtptkklfterprvnewvaeitkrpasekvq
>1bx9A (A:) gikvfghpasiatrrvlialheknldfelvhvelkdgehkkepflsrnpfgqvpafedgd lklfesraitqyiahryenqgtnllqtdsknisqyaimaigmqvedhqfdpvasklafeq ifksiyglttdeavvaeeeaklakvldvyearlkefkylagetftltdlhhipaiqyllg tptkklfterprvnewvaeitkrpasekvq