>2r23B (B:) observed residues (from ATOM records)
evklvesggglvqsggslrlscatsgftftdyymswvrqppgkalewlgfirnkangytt
eyspsvkgrftisrdnsqsilylqmntlraedsatyycardhdgyyerfsywgqgtlvtv
saakttppsvyplapgsaansmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqsd
lytlsssvtvpsstwpsetvtcnvahpasstkvdkkivprdc