Chains and heterogens:
PDB Chain Sequences:
>1eg4A (A:) pasqhflstsvqgpweraispnkvpyyinhetqttcwdhpkmtelyqsladlnnvrfsay rtamklrrlqkalcldllslsaacdaldqhnlkqndqpmdilqiinclttiydrleqehn nlvnvplcvdmclnwllnvydtgrtgrirvlsfktgiislckahledkyrylfkqvasst gfcdqrrlglllhdsiqiprqlgevasfggsniepsvrscfqfannkpeieaalfldwmr lepqsmvwlpvlhrvaaaet