Chains and heterogens:
PDB Chain Sequences:
>1cef_ (-) adlpapddtglqavlhtalsqgapgamvrvddngtihqlsegvadratgraitttdrfrv gsvtksfsavvllqlvdegkldldasvntylpgllpddritvrqvmshrsglydytndmf aqtvpgfesvrnkvfsyqdlitlslkhgvtnapgaaysysntnfvvagmliekltghsva teyqnriftplnltdtfyvhpdtvipgthangyltpdeaggalvdsteqtvswaqsagav isstqdldtffsalmsgqlmsaaqlaqmqqwttvnstqgyglglrrrdlscgisvyghtg tvqgyytyafaskdgkrsvtalantsnnvnvlntmartlesafcgkp