Sequence alignment between 1kh2(A) and UniProt seq P59846 (ASSY_THET8):

P59846 (ASSY_THET8): Argininosuccinate synthase from Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8)
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
UniProt: MKIVLAYSGGLDTSIILKWLKETYRAEVIAFTADIGQGEEVEEAREKALRTGASKAIALDLKEEFVRDFVFPMMRAGAVYEGYYLLGTSIARPLIAKHLVRIAEEEGAEAIAHGATGKGNDQVRFELTAYALKPDIKVIAPWREWSFQGRKEMIAYAEAHGIPVPVTQEKPYSMDANLLHISYEGGVLEDPWAEPPKGMFRMTQDPEEAPDAPEYVEVEFFEGDPVAVNGERLSPAALLQRLNEIGGRHGVGRVDIVENRFVGMKSRGVYETPGGTILYHARRAVESLTLDREVLHQRDMLSPKYAELVYYGFWYAPEREALQAYFDHVARSVTGVARLKLYKGNVYVVGRKAPKSLYRQDLVSFDEAGGYDQKDAEGFIKIQALRLRVRALVEREGHGA
         .....................................................................................................................................................................XXXXX.............................................................................................................................................................................................XXXXXXXXXX...............................
PDB seq: MKIVLAYSGGLDTSIILKWLKETYRAEVIAFTADIGQGEEVEEAREKALRTGASKAIALDLKEEFVRDFVFPMMRAGAVYEGYYLLGTSIARPLIAKHLVRIAEEEGAEAIAHGATGKGNDQVRFELTAYALKPDIKVIAPWREWSFQGRKEMIAYAEAHGIPVP-----PYSMDANLLHISYEGGVLEDPWAEPPKGMFRMTQDPEEAPDAPEYVEVEFFEGDPVAVNGERLSPAALLQRLNEIGGRHGVGRVDIVENRFVGMKSRGVYETPGGTILYHARRAVESLTLDREVLHQRDMLSPKYAELVYYGFWYAPEREALQAYFDHVARSVTGVARLKLYKGNVYVVGRKAPKSLYR----------GYDQKDAEGFIKIQALRLRVRALVER-----
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-----     ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------          +---------+---------+-----     
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160                 180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350                 370       380       390