>4a6yB (B:) observed residues (from ATOM records)
vqlqqpgaelvkpgasvklsckasgytftsywmhwvkqrpgrglewigridpnsggtayn
ekfkskatltvdkpsstaymqlssltsedsavyycarydyyggsyfdywgqgttltvssa
kttppsvyplapgssmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqsdlytlss
svtvpsspwpsetvtcnvahpasstkvdkkivpr