Chains and heterogens:
PDB Chain Sequences:
>6fz7A (A:) srandapivllhgftgwgreemfgfkywggvrgdieqwlndngyrtytlavgplssnwdr aceayaqlvggtvdygaahaakhgharfgrtypgllpelkrggrihiiahsqggqtarml vsllengsqeereyakahnvslsplfegghhfvlsvttiatphdgttlvnmvdftdrffd fqkavlkaaavasnvpytsqvydfkldqwglrrqpgesfdqyferlkrspvwtstdtary dlsvpgaeklnqwvkaspntyylsfatertyrgaltgnyypelgmnafsavvcapflgsy rnatlgiddrwlendgivnafsmngpkrgstdrivpydgtikkgvwndmgtynvdhlevi gvdpnplfdirafylrlaeqlaslqphhhhhh