>1i50A (A:) observed residues (from ATOM records)
vgqqyssaplrtvkevqfglfspeevraisvakirfpetmdetqtrakigglndprlgsi
drnlkcqtcqegmnecpghfghidlakpvfhvgfiakikkvcecvcmhcgkllldehnel
mrqalaikdskkrfaaiwtlcktkmvcetdvpseddptqlvsrggcgntqptirkdglkl
vgswkkdratgdadepelrvlsteeilnifkhisvkdftslgfnevfsrpewmiltclpv
ppppvrpsisfnesqrgeddltfkladilkanisletlehngaphhaieeaesllqfhva
tymdndiagqpqalqksgrpvksirarlkgkegrirgnlmgkrvdfsartvisgdpnlel
dqvgvpksiaktltypevvtpynidrltqlvrngpnehpgakyvirdsgdridlryskra
gdiqlqygwkverhimdndpvlfnrqpslhkmsmmahrvkvipystfrlnlsvtspynad
fdgdemnlhvpqseetraelsqlcavplqivspqsnkpcmgivqdtlcgirkltlrdtfi
eldqvlnmlywvpdwdgviptpaiikpkplwsgkqilsvaipngihlqrfdegttllspk
dngmliidgqiifgvvekktvgssngglihvvtrekgpqvcaklfgniqkvvnfwllhng
fstgigdtiadgptmreitetiaeakkkvldvtkeaqanlltakhgmtlresfednvvrf
lneardkagrlaevnlkdlnnvkqmvmagskgsfiniaqmsacvgqqsvegkriafgfvd
rtlphfskddyspeskgfvensylrgltpqefffhamggreglidtavktaetgyiqrrl
vkaledimvhydnttrnslgnviqfiygedgmdaahiekqsldtiggsdaafekryrvdl
lntdhtldpsllesgseilgdlklqvlldeeykqlvkdrkflrevfvdgeanwplpvnir
riiqnaqqtfhidhtkpsdltikdivlgvkdlqenllvlrgkneiiqnaqrdavtlfccl
lrsrlatrrvlqeyrltkqafdwvlsnieaqflrsvvhpgemvgvlaaqsigepatqmtl
kkvtsgvprlkeilnvaknmktpsltvylepghaadqeqaklirsaiehttlksvtiase
iyydpdprstvipedeeiiqlhfslqqspwllrleldraamndkdltmgqvgerikqtfk
ndlfviwsedndekliircrvvaeedhmlkkientmlenitlrgveniervvmmkydrkv
psptgeyvkepewvletdgvnlsevmtvpgidptriytnsfidimevlgieagraalyke
vynviasdgsyvnyrhmallvdvmttqggltsvtrhgfnrsntgalmrcsfeetveilfe
agasaelddcrgvsenvilgqmapigtgafdvmideesl