Chains and heterogens:
PDB Chain Sequences:
>2y1kA (A:) eddiiiatkngkvrgmqltvfggtvtaflgipyaqpplgrlrfkkpqsltkwsdiwnatk yansccqnidqsfpgfhgsemwnpntdlsedclylnvwipapkpknatvliwiygggfqt gtsslhvydgkflarvervivvsmnyrvgalgflalpgnpeapgnmglfdqqlalqwvqk niaafggnpksvtlfgesagaasvslhllspgshslftrailqsgsfnapwavtslyear nrtlnlakltgcsreneteiikclrnkdpqeillneafvvpygtplsvnfgptvdgdflt dmpdillelgqfkktqilvgvnkdegtaflvygapgfskdnnsiitrkefqeglkiffpg vsefgkesilfhytdwvddqrpenyrealgdvvgdynficpaleftkkfsewgnnaffyy fehrssklpwpewmgvmhgyeiefvfglplerrdqytkaeeilsrsivkrwanfakygnp qetqnnstswpvfksteqkyltlntestrimtklraqqcrfwtsffpkv
>2y1kA (A:) diiiatkngkvrgmqltvfggtvtaflgipyaqpplgrlrfkkpqsltkwsdiwnatkya nsccqnidqsfpgfhgsemwnpntdlsedclylnvwipapkpknatvliwiygggfqtgt sslhvydgkflarvervivvsmnyrvgalgflalpgnpeapgnmglfdqqlalqwvqkni aafggnpksvtlfgesagaasvslhllspgshslftrailqsgsfnapwavtslyearnr tlnlakltgcsreneteiikclrnkdpqeillneafvvpygtplsvnfgptvdgdfltdm pdillelgqfkktqilvgvnkdegtaflvygapgfskdnnsiitrkefqeglkiffpgvs efgkesilfhytdwvdrpenyrealgdvvgdynficpaleftkkfsewgnnaffyyfehr ssklpwpewmgvmhgyeiefvfglplerrdqytkaeeilsrsivkrwanfakygnpqetq nnstswpvfksteqkyltlntestrimtklraqqcrfwtsffpkv