>2zt3A (A:) SEQRES residues vlsegewqlvlhvwakveadvaghgqdilirlfkshpetlekfdrfkhlkteaemkased lkkhgvtvltalgailkkkghheaelkplaqshatkhkipikylefiseaiihvlhsrhp gdfgadaqgamnkalelfrkdiaakykelgyqg