>5nx3A (A:) observed residues (from ATOM records)
lvhggpcdktshpyqaalytsghllcggvlihplwvltaahckkpnlqvflgkhnlgqqe
ssqeqssvvravihpdydaashdqdimllrlarpaklseliqplplerdcsaqttschil
gwgktadgdfpdtiqcayihlvsreecehaypgqitqnmlcagdekygkdscqgdsggpl
vcgdhlrglvswgnipcgskekpgvytnvcrytnwiqktiqa