Chains and heterogens:
PDB Chain Sequences:
>1yub_ (-) mnknikysqnfltsekvlnqiikqlnlketdtvyeigtgkghlttklakiskqvtsield shlfnlsseklklntrvtlihqdilqfqfpnkqrykivgnipyhlstqiikkvvfesras diyliveegfykrtldihrtlglllhtqvsiqqllklpaecfhpkpkvnsvlikltrhtt dvpdkywklytyfvskwvnreyrqlftknqfhqamkhakvnnlstityeqvlsifnsyll fngrk