>1exnA (A:) observed residues (from ATOM records)
rnlmivdgtnlgfrfkhnnskkpfassyvstiqslaksysarttivlgdkgksvfrlehl
peykgnrdekyaqrteeekaldeqffeylkdafelckttfptftirgveaddmaayivkl
ighlydhvwlistdgdwdtlltdkvsrfsfttrreyhlrdmyehhnvddveqfislkaim
gdlgdnirgvegigakrgyniirefgnvldiidqlplpgkqkyiqnlnaseellfrnlil
vdlptycvdaiaavgqdvldkftkdileiae