>3a7sA (A:) observed residues (from ATOM records)
ewclmesdpgvftelikgfgcrgaqveeiwslepenfeklkpvhgliflfkwqpgeepag
svvqdsrldtiffakqvinnaaatqaivsvllncthqdvhlgetlsefkefsqsfdaamk
glalsnsdvirqvhnsfarafhfvsyvpvngrlyeldglregpidlgacnqddwisavrp
viekriqkysegeirfnlmaivsd