... also found in all the snake enzymes. The uniquecysteine-rich-terminus and inserted Ser in the Ca2+-bindingsite of amphibian DNases I [14], were not observed in thesnake enzymes. As in mammalian, ... pCR II TAcloning vector (Invitrogen, San Diego, CA, USA) andsequenced. The nt sequences were determined by thedideoxy chain-termination method using a Dye TerminatorCycle sequencing kit (Applied ... andsmall intestine, in snakes and amphibia [14] contrasts withthe situation in mammals and birds, in which morewidespread expression has been observed in varioustissues, including the kidney,...