Chains and heterogens:
PDB Chain Sequences:
>1kkfA (A:) mgnnvvvlgtqwgdegkgkivdllterakyvvryqgghnaghtlvingektvlhlipsgi lrenvtsiigngvvlspaalmkemkeledrgipvrerlllseacplildyhvaldnarek argakaigttgrgigpayedkvarrglrvgdlfdketfaeklkevmeyhnfqlvnyykae avdyqkvlddtmavadiltsmvvdvsdlldqarqrgdfvmfegaqgtlldidhgtypyvt ssnttaggvatgsglgpryvdyvlgilkaystrvgagpfptelfdetgeflckqgnefga ttgrrrrtgwldtvavrravqlnslsgfcltkldvldglkevklcvayrmpdgrevtttp laaddwkgvepiyetmpgwsestfgvkdrsglpqaalnyikrieeltgvpidiistgpdr tetmilrdpfda
>1kkfA (A:) gnnvvvlgtqwgdegkgkivdllterakyvvryqgghnaghtlvingektvlhlipsgil renvtsiigngvvlspaalmkemkeledrgipvrerlllseacplildyhvaldnareka rgakaigttgrgigpayedkvarrglrvgdlfdketfaeklkevmeyhnfqlvnyykaea vdyqkvlddtmavadiltsmvvdvsdlldqarqrgdfvmfegaqgtlldidhgtypyvts snttaggvatgsglgpryvdyvlgilkaystrvgagpfptelfdetgeflckqgnefgat tgrrrrtgwldtvavrravqlnslsgfcltkldvldglkevklcvayrmpdgrevtttpl aaddwkgvepiyetmpgwsestfgvkdrsglpqaalnyikrieeltgvpidiistgpdrt etmilrdpfda