Chains and heterogens:
PDB Chain Sequences:
>4apyA (A:) mptpnipsdfdfldatlnlerlpveelaelrksepihwvdvpggtggfgdkgywlvtkha dvkevsrrsdvfgsspdgaipvwpqdmtreavdlqravllnmdapqhtrlrkiisrgftp raigrledelrsraqkiaqtaaaqgagdfveqvscelplqaiaellgvpqddrdklfrws nemtagedpeyadvdpamssfelisyamkmaeeravnptedivtklieadidgeklsdde fgffvvmlavagnettrnsithgmiafaqnpdqwelykkerpetaadeivrwatpvsafq rtaledvelggvqikkgqrvvmsyrsanfdeevfedphtfnilrspnphvgfggtgahyc iganlarmtinlifnaiadnmpdlkpigaperlksgwlngikhwqvdytgagkasvsgap gtcpvahhhhhhh
>4apyA (A:) ptpnipsdfdfldatlnlerlpveelaelrksepihwvdvpggtggfgdkgywlvtkhad vkevsrrsdvfgsspdgaipvwpqdmtreavdlqravllnmdapqhtrlrkiisrgftpr aigrledelrsraqkiaqtaaaqgagdfveqvscelplqaiaellgvpqddrdklfrwsn emtagedpeyadvdpamssfelisyamkmaeeravnptedivtklieadidgeklsddef gffvvmlavagnettrnsithgmiafaqnpdqwelykkerpetaadeivrwatpvsafqr taledvelggvqikkgqrvvmsyrsanfdeevfedphtfnilrspnphvgfggtgahyci ganlarmtinlifnaiadnmpdlkpigaperlksgwlngikhwqvdytgagkas