>3u4lA (A:) observed residues (from ATOM records)
aalvvdngsgmckagfagddapravfpsivgdsyvgdeaqskrgikypiehgivtnwddm
ekiwhhtfynelrvapeehpvllteaplnpkanrekmtqimfetfntpamyvaiqavlsl
yasgrttgivmdsgdgvthtvpiyegyalphailrldlagrdltdylmkiltergysftt
taereivrdikeklcyvaldfeqemataassssleksyelpdgqvitignerfrcpealf
qpsflgmescgihettfnsimkcdvdirkdlyantvlsggttmypgiadrmqkeitalap
stmkikiiapperkysvwiggsilaslstfqqmwiskqeydesgpsivhrkcf