>1q74C (C:) observed residues (from ATOM records)
setprllfvhahpddeslsngatiahytsrgaqvhvvtctlgeegevigdrwaqltadha
dqlggyrigeltaalralgvsapiylggagrwrdsrsqrrfvdadprqtvgalvaiirel
rphvvvtydpnggyghpdhvhthtvttaavaaagadhpgdpwtvpkfywtvlglsalisg
aralvpddlrpewvlprgysddgidavveadeqaraakvaalaahatqvvvgptgraaal
snnlalpiladehyvlaggsagardergwetdllaglgf