>3l75N (N:) observed residues (from ATOM records)
tyaqtlqnipetnvttldnglrvaseessqptctvgvwigagsryeneknngagyfvehl
afkgtkkrpcaafekevesmgahfngytsreqtafyikalskdmpkvvelladvvqncal
eesqiekergvilqelkemdndmtnvtfdylhatafqgtalartvegttenikhltradl
asyidthfkaprmvlaaaggishkelvdaarqhfsgvsftykedavpilprcrftgseir
arddalpvahvalavegpgwadpdnvvlhvanaiigrydrtfgggkhlssrlaalavehk
lchsfqtfntsysdtglfgfhfvadplsiddmmfcaqgewmrlctsttesevkraknhlr
samvaqldgttpvcetigshllnygrrisleewdsrisavdarmvrdvcskyiydkcpal
aavgpieqlldynrirsgmywi