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.
Sarah Drew. Sarah Drew (born October 1, 1980) is an American actress. She is known for playing Hannah Rogers in The WB family drama series Everwood (2004â06) and Dr. April Kepner in the ABC medical drama series Grey's Anatomy (2009âpresent). 1 Early life.