DNA polymerases need a primer oligonucleotide (RNA or DNA) - their substrates are an existing 3'-OH group and a dNTP. The primase however is a typical RNA polymerase, capable of initiating polynucleotide synthesis de novo by positioning a complementary ribonucleoside 5'-triphosphate opposite its complementary DNA base.
Alison Schapker. Alison Schapker is an American television writer and producer. She is well known for her work on the ABC espionage series Alias and for the FOX science-fiction series Fringe.
Season 2, Episode 11, The Gift. Alison Arngrim is a natural-born performer with a love for people and a gift for making them laugh. So, not surprisingly, she entered the entertainment field at a young age, starting out in commercials and bit parts and moving up through the years.