Chains and heterogens:
PDB Chain Sequences:
>4bqzA (A:) mahhhhhhvgtgsnddddkspdptqdvreppalkygivldagsshtsmfvykwpadkend tgivgqhsscdvqgggissyandpskagqslvrcleqalrdvprdrhastplylgatagm rllnltspeatarvleavtqtltqypfdfrgarilsgqdegvfgwvtanyllenfikygw vgrwirprkgtlgamdlggastqitfettspsedpgnevhlrlygqhyrvythsflcygr dqillrllasalqihrfhpcwpkgystqvllqevyqspctmgqrprafngsaivslsgts natlcrdlvsrlfnisscpfsqcsfngvfqppvagnfiafsafyytvdflttvmglpvgt lkqleeateitcnqtwtelqarvpgqktrladycavamfihqllsrgyhfdersfrevvf qkkaadtavgwalgymlnltnlipadlpglrkgthfs
>4bqzA (A:) palkygivldagsshtsmfvykwpadkendtgivgqhsscdvqgggissyandpskagqs lvrcleqalrdvprdrhastplylgatagmrllnltspeatarvleavtqtltqypfdfr garilsgqdegvfgwvtanyllenfikygwvgrwirprkgtlgamdlggastqitfetts psedpgnevhlrlygqhyrvythsflcygrdqillrllasalqihrfhpcwpkgystqvl lqevyqspctmgqsaivslsgtsnatlcrdlvsrlfnisscpfsqcsfngvfqppvagnf iafsafyytvdflttvmglpvgtlkqleeateitcnqtwtelqarvpgqktrladycava mfihqllsrgyhfdersfrevvfqkkaadtavgwalgymlnltnlipadlpglrkgthfs