Chains and heterogens:
PDB Chain Sequences:
>2a7nA (A:) msqnlfnvedyrklaqkrlpkmvydyleggaedeygvkhnrdvfqqwrfkpkrlvdvsrr slqaevlgkrqsmplligptalngalwpkgdlalaraatkagipfvlstasnmsiedlar qcdgdlwfqlyvihreiaqgmvlkalhtgyttlvlttdvavngyrerdlhnrfkippflt lknfegidlgkmdkanlemqaalmsrqmdasfnwealrwlrdlwphkllvkgllsaedad rciaegadgvilsnhggrqldcaispmevlaqsvaktgkpvlidsgfrrgsdivkalalg aeavllgratlyglaargetgvdevltllkadidrtlaqigcpditslspdylqnegvtn tapvdhligkgthahhhhhh
>2a7nA (A:) nlfnvedyrklaqkrlpkmvydyleggaedeygvkhnrdvfqqwrfkpkrlvdvsrrslq aevlgkrqsmplligptalngalwpkgdlalaraatkagipfvlstasnmsiedlarqcd gdlwfqlyvihreiaqgmvlkalhtgyttlvlttdvavngyrerdlhnrfkippfltlkn fegidlgkmdkanlemqaalmsrqmdasfnwealrwlrdlwphkllvkgllsaedadrci aegadgvilsnhggrqldcaispmevlaqsvaktgkpvlidsgfrrgsdivkalalgaea vllgratlyglaargetgvdevltllkadidrtlaqigcpditslspdylqne