Chains and heterogens:
PDB Chain Sequences:
>1n4gA (A:) mtatvllevpfsargdripdavaelrtrepirkvrtitgaeawlvssyalctqvledrrf smketaaagaprlnaltvppevvnnmgniadaglrkavmkaitpkapgleqflrdtansl ldnlitegapadlrndfadplatalhckvlgipqedgpklfrslsiafmssadpipaaki nwdrdieymagilenpnittglmgelsrlrkdpayshvsdelfatigvtffgagvistgs flttalisliqrpqlrnllhekpelipagveellrinlsfadglprlatadiqvgdvlvr kgelvlvlleganfdpehfpnpgsieldrpnptshlafgrgqhfcpgsalgrrhaqigie allkkmpgvdlavpidqlvwrtrfqrriperlpvlw
>1n4gA (A:) atvllevpfsargdripdavaelrtrepirkvrtitgaeawlvssyalctqvledrrfsm ketaaagaprlnaltvppevvnnmgniadaglrkavmkaitpkaleqflrdtanslldnl itegapadlrndfadplatalhckvlgipqedgpklfrslsiafmssadpipaakinwdr dieymagilenpnittglmgelsrlrkdpayshvsdelfatigvtffgagvistgsfltt alisliqrpqlrnllhekpelipagveellrinlsfadglprlatadiqvgdvlvrkgel vlvlleganfdpehfpnpgsieldrpnptshlafgrgqhfcpgsalgrrhaqigieallk kmpgvdlavpidqlvwrtrfqrriperlpvlw