>1tkuB (B:) observed residues (from ATOM records)
niftpieealeaykngeflivmddedrenegdlimaaelitqekmaflvryssgyvcvpl
seeranqlelppmlagtaytitcdfaegtttgisahdralttrslanpnskpqdfikpgh
ilplravpgllkkrrghteaavqlstlaglqpagvicelvrdedglmmrlddciqfgkkh
gikiininqlveyisk