>1is7A (A:) observed residues (from ATOM records) rprseednelnlpnlaaayssilrslgedpqrqgllktpwraatamqfftkgyqetisdv lndaifdedhdemvivkdidmfsmcehhlvpfvgrvhigylpnkqvlglsklariveiys rrlqvqerltkqiavaitealqpagvgvvieathmcmvmrgvqkmnsktvtstmlgvfre dpktreefltlirs