Chains and heterogens:
PDB Chain Sequences:
>1b6a_ (-) kvqtdppsvpicdlypngvfpkgqeceypptqdgrtaawrttseekkaldqaseeiwndf reaaeahrqvrkyvmswikpgmtmieicekledcsrklikenglnaglafptgcslnnca ahytpnagdttvlqyddickidfgthisgriidcaftvtfnpkydtllkavkdatntgik cagidvrlcdvgeaiqevmesyeveidgktyqvkpirnlnghsigqyrihagktvpivkg geatrmeegevyaietfgstgkgvvhddmecshymknfdvghvpirlprtkhllnvinen fgtlafcrrwldrlgeskylmalknlcdlgivdpypplcdikgsytaqfehtillrptck evvsrgddy
>1b6a_ (-) kvqtdppsvpicdlypngvfpkgqeceypeekkaldqaseeiwndfreaaeahrqvrkyv mswikpgmtmieicekledcsrklikenglnaglafptgcslnncaahytpnagdttvlq yddickidfgthisgriidcaftvtfnpkydtllkavkdatntgikcagidvrlcdvgea iqevmesyeveidgktyqvkpirnlnghsigqyrihagktvpivkggeatrmeegevyai etfgstgkgvvhddmecshymknfdvghvpirlprtkhllnvinenfgtlafcrrwldrl geskylmalknlcdlgivdpypplcdikgsytaqfehtillrptckevvsrgddy