Chains and heterogens:
PDB Chain Sequences:
>2xqkA (A:) diiiatkngkvrgmqltvfggtvtaflgipyaqpplgrlrfkkpqsltkwsdiwnatkya nsccqnidqsfpgfhgsemwnpntdlsedclylnvwipapkpknatvliwiygggfqtgt sslhvydgkflarvervivvsmnyrvgalgflalpgnpeapgnmglfdqqlalqwvqkni aafggnpksvtlfgesagaasvslhllspgshslftrailqsgsfnapwavtslyearnr tlnlakltgcsreneteiikclrnkdpqeillneafvvpygtplsvnfgptvdgdfltdm pdillelgqfkktqilvgvnkdegtaflvygapgfskdnnsiitrkefqeglkiffpgvs efgkesilfhytdwvddqrpenyrealgdvvgdynficpaleftkkfsewgnnaffyyfe hrssklpwpewmgvmhgyeiefvfglplerrdqytkaeeilsrsivkrwanfakygnpqe tqnqstswpvfksteqkyltlntestrimtklraqqcrfwtsffpkv