Chains and heterogens:
PDB Chain Sequences:
>1shcA (A:) gshmgqlggeewtrhgsfvnkptrgwlhpndkvmgpgvsylvrymgcvevlqsmraldfn trtqvtreaislvceavpgakgatrrrkpcsrplssilgrsnlkfagmpitltvstssln lmaadckqiianhhmqsisfasggdpdtaeyvayvakdpvnqrachilecpeglaqdvis tigqafelrfkqylr