>4cywB (B:) observed residues (from ATOM records)
glfgaiagfiengwegmvdgwygfrhqnaqgtgqaadykstqaaidqitgklnrliektn
tefesiesefseiehqignvinwtkdsitdiwtyqaellvamenqhtidmadsemlnlye
rvrkqlrqnaeedgkgcfeiyhacddscmesirnntydhsqyreeallnrln