Chains and heterogens:
PDB Chain Sequences:
>1rc7A (A:) mkmleqlekklgytfkdksllekalthvsyskkehyetleflgdalvnffivdllvqysp nkregflsplkayliseeffnllaqklelhkfirikrgkinetiigdvfkalwaavyids grdanftrelfyklfkedilsaikegrvkkdyktilqeitqkrwkerpeyrlisvegphh kkkfiveakikeyrtlgegkskkeaeqraaeelikllees