Chains and heterogens:
PDB Chain Sequences:
>1vfd_ (-) grrrsvqwcavsqpeatkcfqwqrnmrrvrgppvscikrdspiqciqaiaenradavtld ggfiyeaglapyklrpvaaevygterqprthyyavavvkkggsfqlnelqglkschtglr etagwnvpigtlrpflnwtgppepieaavarffsascvpgadkgqfpnlcrlcagtgenk cafssqepyfsysgafkclrdgagdvafirestvfedlsdeaerdeyellcpdntrkpvd kfkdchlarvpshavvarsvngkedaiwnllrqaqekfgkdkspkfqlfgspsgqkdllf kdsaigfsrvppridsglylgsgyftaiqn
>1vfd_ (-) svqwcavsqpeatkcfqwqrnmrrvrgppvscikrdspiqciqaiaenradavtldggfi yeaglapyklrpvaaevygterqprthyyavavvkkggsfqlnelqglkschtglretag wnvpigtlrpflnwtgppepieaavarffsascvpgadkgqfpnlcrlcagtgenkcafs sqepyfsysgafkclrdgagdvafirestvfedlsdeaerdeyellcpdntrkpvdkfkd chlarvpshavvarsvngkedaiwnllrqaqekfgkdkspkfqlfgspsgqkdllfkdsa igfsrvppridsglylgsgyf