Chains and heterogens:
PDB Chain Sequences:
>3bu7A (A:) mgsshhhhhhssglvprgshmapteikpeddilgrarvrdtpeleayyddlakietgalw tvandiepweptpksapvhwkwsdlrrevlraidlvrpedagrrvvylrnpqrkdvsaac gwlfsgiqtmkageragahrhaasalrfimegsgaytivdghkvelgandfvltpngtwh ehgilesgteciwqdgldipltncleanfyevhpndyqttdiplndspltyggpallpql dkwdkpyspllkysweptyeallnyakasdgspydglilrytnpqtgghpmltmgasmqm lrpgehtkahrhtgnviynvakgqgysivggkrfdwsehdifcvpawtwhehcntqerdd aclfsfndfpvmeklgfwaeqaledngghqivad
>3bu7A (A:) rdtpeleayyddlakietgalwtvandiepweptpksapvhwkwsdlrrevlraidlvrp edagrrvvylrnpqrkdvsaacgwlfsgiqtmkageragahrhaasalrfimegsgayti vdghkvelgandfvltpngtwhehgilesgteciwqdgldipltncleanfyevhpndyq ttdiplndspltyggpallpqldkwdkpyspllkysweptyeallnyakasdgspydgli lrytnpqtgghpmltmgasmqmlrpgehtkahrhtgnviynvakgqgysivggkrfdwse hdifcvpawtwhehcntqerddaclfsfndfpvmeklgfwaeqaledngghqiva
>3bu7B (B:) mgsshhhhhhssglvprgshmapteikpeddilgrarvrdtpeleayyddlakietgalw tvandiepweptpksapvhwkwsdlrrevlraidlvrpedagrrvvylrnpqrkdvsaac gwlfsgiqtmkageragahrhaasalrfimegsgaytivdghkvelgandfvltpngtwh ehgilesgteciwqdgldipltncleanfyevhpndyqttdiplndspltyggpallpql dkwdkpyspllkysweptyeallnyakasdgspydglilrytnpqtgghpmltmgasmqm lrpgehtkahrhtgnviynvakgqgysivggkrfdwsehdifcvpawtwhehcntqerdd aclfsfndfpvmeklgfwaeqaledngghqivad
>3bu7B (B:) rvrdtpeleayyddlakietgalwtvandiepweptpksapvhwkwsdlrrevlraidlv rpedagrrvvylrnpqrkdvsaacgwlfsgiqtmkageragahrhaasalrfimegsgay tivdghkvelgandfvltpngtwhehgilesgteciwqdgldipltncleanfyevhpnd yqttdiplndspltyggpallpqldkwdkpyspllkysweptyeallnyakasdgspydg lilrytnpqtgghpmltmgasmqmlrpgehtkahrhtgnviynvakgqgysivggkrfdw sehdifcvpawtwhehcntqerddaclfsfndfpvmeklgfwaeqaledngghqivad