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.
Sunetra Sarker Corfield (born 1973 in Liverpool) is an English actress, most notable for her role as Dr Hanna on Casualty. Sunetra has a degree in Business and French from Brunel University. She has played a wide variety of roles in her career.