Chains and heterogens:
PDB Chain Sequences:
>1sig_ (-) megeidiakriedginqvqcsvaeypeaitylleqynrveaeearlsdlitgfvdpnaee dlaptathvgselsqedldddededeedgdddsadddnsidpelarekfaelraqyvvtr dtikakgrshataqeeilklsevfkqfrlvpkqfdylvnsmrvmmdrvrtqerlimklcv eqckmpkknfitlftgnetsdtwfnaaiamnkpwseklhdvseevhralqklqqieeetg ltieqvkdinrrmsigeakarrakkemveanlrlvisiakkytnrglqfldliqegnigl mkavdkfeyrrgykfstyatwwirqaitrsiadq
>1sig_ (-) megeidiakriedginqvqcsvaeypeaitylleqynrveaeearlsdlitgfvddlapt athvgselsqedldidpelarekfaelraqyvvtrdtikahataqeeilklsevfkqfrl vpkqfdylvnsmrvmmdrvrtqerlimklcveqckmpkknfitlftgnetsdtwfnaaia mnkpwseklhdvseevhralqklqqieeetgltieqvkdinrrmsigeakarrakkemve anlrlvisiakkytnrglqfldliqegniglmkavdkfeyrrgykfstyatwwirqaitr siadq