Publisher Summary Since the establishment of DNA cloning techniques, many genes
coding for DNA polymerase have been cloned and sequenced, and their deduced amino
acid sequences have been compared. Based on the sequence similarities, DNA
polymerases are now classified into four families, family A, B, C, and X. In isolating the entire
set of DNA polymerase activities from one hyperthermophilic archaeon, a new DNA
polymerase is discovered that does not belong to any family. This enzyme isolated from …