Chains and heterogens:
PDB Chain Sequences:
>1x0aA (A:) mrwradflsawaeallrkagadepsakavawalveadlrgvgshgllrlpvyvrrleagl vnpsptlpleergpvalldgehgfgprvalkaveaaqslarrhglgavgvrrsthfgmag lyaeklaregfvawvttnaepdvvpfggrekalgtnplafaapapqgilvadlatsesam gkvflarekgerippswgvdregsptddphrvyalrplggpkgyalallvevlsgvltga gvahgigrmydewdrpqdvghfllaldpgrfvgkeaflermgalwqalkatppapgheev flpgelearrreralaegmalpervvaelkalgerygvpwrdda