Chains and heterogens:
PDB Chain Sequences:
>1gr7A (A:) aessvdiqgndqmqfntnaitvdksckqftvnlshpgnlpknvmghnwvlstaadmqgvv tdgmasgldkdylkpddsrviahtkligsgekdsvtfdvpklkegeqymffctfpghsal mkgtltlk
>1gr7A (A:) essvdiqgndqmqfntnaitvdksckqftvnlshpgnlpknvmghnwvlstaadmqgvvt dgmasgldkdylkpddsrviahtkligsgekdsvtfdvpklkegeqymffctfpghsalm kgtltlk
>1gr7B (B:) aessvdiqgndqmqfntnaitvdksckqftvnlshpgnlpknvmghnwvlstaadmqgvv tdgmasgldkdylkpddsrviahtkligsgekdsvtfdvpklkegeqymffctfpghsal mkgtltlk
>1gr7B (B:) ssvdiqgndqmqfntnaitvdksckqftvnlshpgnlpknvmghnwvlstaadmqgvvtd gmasgldkdylkpddsrviahtkligsgekdsvtfdvpklkegeqymffctfpghsalmk gtltlk
>1gr7C (C:) aessvdiqgndqmqfntnaitvdksckqftvnlshpgnlpknvmghnwvlstaadmqgvv tdgmasgldkdylkpddsrviahtkligsgekdsvtfdvpklkegeqymffctfpghsal mkgtltlk
>1gr7C (C:) ssvdiqgndqmqfntnaitvdksckqftvnlshpgnlpknvmghnwvlstaadmqgvvtd gmasgldkdylkpddsrviahtkligsgekdsvtfdvpklkegeqymffctfpghsalmk gtltlk
>1gr7D (D:) aessvdiqgndqmqfntnaitvdksckqftvnlshpgnlpknvmghnwvlstaadmqgvv tdgmasgldkdylkpddsrviahtkligsgekdsvtfdvpklkegeqymffctfpghsal mkgtltlk
>1gr7D (D:) essvdiqgndqmqfntnaitvdksckqftvnlshpgnlpknvmghnwvlstaadmqgvvt dgmasgldkdylkpddsrviahtkligsgekdsvtfdvpklkegeqymffctfpghsalm kgtltlk