Chains and heterogens:
PDB Chain Sequences:
>2q13A (A:) gshmdklpieetledspqtrsllgvfeedataisnymnqlyqamhriydaqnelsaathl tskllkeyekqrfplggddevmsstlqqfskvidelsschavlstqladammfpitqfke rdlkeiltlkevfqiasndhdaainrysrlskkrendkvkyevtedvytsrkkqhqtmmh yfcalntlqykkkiallepllgymqaqisffkmgsenlneqleeflanigtsvqnvrrem dsdietmqqtiedlevasdplyvpdpdptkfpvnrnltrkagylnarnktglvsstwdrq fyftqggnlmsqargdvagglamdidncsvmavdcedrrycfqitsfdgkkssilqaesk kdheewictinniskqiylsenpee
>2q13A (A:) mdklpieetledspqtrsllgvfeedataisnymnqlyqamhriydaqnelsaathltsk llkeyekqrfpldevmsstlqqfskvidelsschavlstqladammfpitqfkerdlkei ltlkevfqiasndhdaainrysrlskkrendkvkyevtedvytsrkkqhqtmmhyfcaln tlqykkkiallepllgymqaqisffkmgsenlneqleeflanigtsvqnvrremdsdiet mqqtiedlevasdplyvpdpdptkfpvnrnltrkagylnartwdrqfyftqggnlmsqar gdvagglamdidncsvmavdcedrrycfqitsfdgkkssilqaeskkdheewictinnis kqiy