Chains and heterogens:
PDB Chain Sequences:
>3k7yA (A:) mdkllsslenievdnilktarefkedtceekinlsigvccnddgdlhifdsvlnadklvt enykekpyllgngtedfstltqnlifgnnskyiedkkictiqciggtgaifvlleflkml nvetlyvtnppyinhvnmiesrgfnlkyinffdynlidinydlflndlrnipngssvilq iscynpcsvnieekyfdeiieivlhkkhviifdiayqgfghtnleedvllirkfeeknia fsvcqsfsknmslygeragalhivcknqeekkivfnnlcfivrkfysspvihtnrilcql lnnqnlklnwikelsqlsqritnnrilffnkletyqkkynlnydwnvykkqrglfsfvpl lakiaehlkthhiyiinngrinvsgitknnvdyiadkiclslsqi