>1a6k_ (-) SEQRES residues vlsegewqlvlhvwakveadvaghgqdilirlfkshpetlekfdrfkhlkteaemkased lkkhgvtvltalgailkkkghheaelkplaqshatkhkipikylefiseaiihvlhsrhp gdfgadaqgamnkalelfrkdiaakykelgy