Chains and heterogens:
PDB Chain Sequences:
>3pupA (A:) msgrprttsfaesckpvqqpsafgsmkvsrdkdgskvttvvatpgqgpdrpqevsytdtk vigngsfgvvyqaklcdsgelvaikkvlqdkrfknrelqimrkldhcnivrlryffyssg ekkdevylnlvldyvpetvyrvarhysrakqtlpviyvklymyqlfrslayihsfgichr dikpqnllldpdtavlklcdfgsakqlvrgepnvsyicsryyrapelifgatdytssidv wsagcvlaelllgqpifpgdsgvdqlveiikvlgtptreqiremnpnytefkfpqikahp wtkvfrprtppeaialcsrlleytptarltpleacahsffdelrdpnvklpngrdtpalf nfttqelssnpplatilipphariqaaastptnataasdantgdrgqtnnaasasasnst
>3pupA (A:) skvttvvatpgqgpdrpqevsytdtkvigngsfgvvyqaklcdsgelvaikkvlqdkrfk nrelqimrkldhcnivrlryffyssekkdevylnlvldyvpetvyrvarhysrakqtlpv iyvklymyqlfrslayihsfgichrdikpqnllldpdtavlklcdfgsakqlvrgepnvs yicsryyrapelifgatdytssidvwsagcvlaelllgqpifpgdsgvdqlveiikvlgt ptreqiremnpnytfkfpqikahpwtkvfrprtppeaialcsrlleytptarltpleaca hsffdelrdpnvklpngrdtpalfnfttqelssnpplatilippha
>3pupB (B:) msgrprttsfaesckpvqqpsafgsmkvsrdkdgskvttvvatpgqgpdrpqevsytdtk vigngsfgvvyqaklcdsgelvaikkvlqdkrfknrelqimrkldhcnivrlryffyssg ekkdevylnlvldyvpetvyrvarhysrakqtlpviyvklymyqlfrslayihsfgichr dikpqnllldpdtavlklcdfgsakqlvrgepnvsyicsryyrapelifgatdytssidv wsagcvlaelllgqpifpgdsgvdqlveiikvlgtptreqiremnpnytefkfpqikahp wtkvfrprtppeaialcsrlleytptarltpleacahsffdelrdpnvklpngrdtpalf nfttqelssnpplatilipphariqaaastptnataasdantgdrgqtnnaasasasnst
>3pupB (B:) skvttvvatpgqgpdrpqevsytdtkvigngsfgvvyqaklcdsgelvaikkvlqdkrfk nrelqimrkldhcnivrlryffyssekkdevylnlvldyvpetvyrvarhysrakqtlpv iyvklymyqlfrslayihsfgichrdikpqnllldpdtavlklcdfgsakqlvrgepnvs yicsryyrapelifgatdytssidvwsagcvlaelllgqpifpgdsgvdqlveiikvlgt ptreqiremnpnytfkfpqikahpwtkvfrprtppeaialcsrlleytptarltpleaca hsffdelrdpnvklpngrdtpalfnfttqelssnpplatilipphar