Chains and heterogens:
PDB Chain Sequences:
>1qf4A (A:) gnnvvvlgtqwgdegkgkivdllterakyvvryqgghnaghtlvingektvlhlipsgil renvtsiigngvvlspaalmkemkeledrgipvrerlllseacplildyhvaldnareka rgakaigttgrgigpayedkvarrglrvgdlfdketfaeklkevmeyhnfqlvnyykaea vdyqkvlddtmavadiltsmvvdvsdlldqarqrgdfvmfegaqgtlldidhgtypyvts snttaggvatgsglgpryvdyvlgilkaystrvgagpfptelfdetgeflckqgnefgat tgrrrrtgwldtvavrravqlnslsgfcltkldvldglkevklcvayrmpdgrevtttpl aaddwkgvepiyetmpgwsestfgvkdrsglpqaalnyikrieeltgvpidiistgpdrt etmilrdpfda