Chains and heterogens:
PDB Chain Sequences:
>1eg3A (A:) pasqhflstsvqgpweraispnkvpyyinhetqttcwdhpkmtelyqsladlnnvrfsay rtamklrrlqkalcldllslsaacdaldqhnlkqndqpmdilqiinclttiydrleqehn nlvnvplcvdmclnwllnvydtgrtgrirvlsfktgiislckahledkyrylfkqvasst gfcdqrrlglllhdsiqiprqlgevasfggsniepsvrscfqfannkpeieaalfldwmr lepqsmvwlpvlhrvaaaet