>2b4bA (A:) observed residues (from ATOM records)
fvirpataadcsdilrlikelaryeymeeqviltekdlledgfgehpfyhclvaevpkeh
wtpeghsivgfamyyftydpwigkllyledffvmsdyrgfgigseilknlsqvamrcrcs
smhflvaewnepsinfykrrgasdlsseegwrlfkidkeyllkmatee