>4u3sA (A:) observed residues (from ATOM records)
esyitmnfdkntaevgqiikatvkinkitnfsgyqvnikydptvlqavnpktgvaytnss
lptsgellvnedygpivqgvhkisegilnlsrsytaldvyrasespeetgtvavvgfkal
qkkattvvfehsvtmpngiigttlfnwygnritsgysviqpgeinse