Chains and heterogens:
PDB Chain Sequences:
>1xf0A (A:) mdskqqcvklndghfmpvlgfgtyappevprskalevtklaieagfrhidsahlynneeq vglairskiadgsvkredifytsklwstfhrpelvrpalenslkkaqldyvdlylihspm slkpgeelsptdengkvifdivdlcttweamekckdaglaksigvsnfnrrqlemilnkp glkykpvcnqvechpyfnrsklldfckskdivlvaysalgsqrdkrwvdpnspvlledpv lcalakkhkrtpalialryqlqrgvvvlaksyneqrirqnvqvfefqltaedmkaidgld rnlhyfnsdsfashpnypysdey
>1xf0A (A:) qqcvklndghfmpvlgfgtyappeskalevtklaieagfrhidsahlynneeqvglairs kiadgsvkredifytsklwstfhrpelvrpalenslkkaqldyvdlylihspmslkpgee lsptdengkvifdivdlcttweamekckdaglaksigvsnfnrrqlemilnkpglkykpv cnqvechpyfnrsklldfckskdivlvaysalgsqrdkrwvdpnspvlledpvlcalakk hkrtpalialryqlqrgvvvlaksyneqrirqnvqvfefqltaedmkaidgldrnlhyfn sdsfashpnypysdey