Chains and heterogens:
PDB Chain Sequences:
>6fzaA (A:) randapivllhgftgwgreemfgfkywggvrgdieqwlndngyrtytlavgplssnwdra ceayaqlvggtvdygaahaakhgharfgrtypgllpelkrggrihiiahsqggqtarmlv sllengsqeereyakahnvslsplfegghhfvlsvttiatphdgttlvnmvdftdrffdl qkfvlkaaavasnvpytsqvydfkldqwglrrqpgesfdqyferlkrspvwtstdtaryd lsvpgaeklnqwvkaspntyylsfatertyrgaltgnyypelgmnafsavvcapflgsyr natlgiddrwlendgivnafsmngpkrgstdrivpydgtikkgvwndmgtynvdhlevig vdpnplfdirafylrlaeqlaslqphhhhhh