Chains and heterogens:
PDB Chain Sequences:
>1itxA (A:) lqpataeaadsykivgyypswaaygrnynvadidptkvthinyafadicwngihgnpdps gpnpvtwtcqneksqtinvpngtivlgdpwidtgktfagdtwdqpiagninqlnklkqtn pnlktiisvggwtwsnrfsdvaataatrevfansavdflrkynfdgvdldweypvsggld gnskrpedkqnytlllskirekldaagavdgkkylltiasgasatyaantelakiaaivd winimtydfngawqkisahnaplnydpaasaagvpdantfnvaagaqghldagvpaaklv lgvpfygrgwdgcaqagngqyqtctggssvgtweagsfdfydleanyinkngytrywndt akvpylynasnkrfisyddaesvgyktayikskglggamfwelsgdrnktlqnklkadl