Chains and heterogens:
PDB Chain Sequences:
>3b4xA (A:) mydwfkqmrkespvyydgkvwnlfkyedckmvlndhkrfssnltgyndklemlrsgkvff diptrytmltsdpplhdelrnltadafnpsnlpvdfvrevtvkllseldeefdviesfai plpilviskmlginpdvkkvkdwsdlvalrlgradeifsigrkylelisfskkeldsrkg keivdltgkiansnlselekegyfillmiagnetttnlignaiedftlynswdyvrekga lkaveealrfsppvmrtirvtkekvkirdqvidegelvrvwiasanrdeevfkdpdsfip drtpnphlsfgsgihlclgaplarlearialeefakkfrvkeivkkekidnevlngyrkl vvrvert