Function of three polymerases during the Okazaki fragment cycle. 
Two Pol III cores are attached to β clamps on the leading and lagging strands, creating a loop. 
Primase binds to DnaB helicase and synthesizes an RNA primer (purple). 
The clamp loader assembles a β clamp onto the new RNA primer. 
The second lagging- strand Pol III core (third polymerase) assembles with the new clamp while the first lagging- strand Pol III core is extending an Okazaki fragment, creating two DNA loops. 
The first lagging- strand Pol III core ejects from the β clamp on the first Okazaki fragment, leaving the clamp on the DNA.
Two Pol III cores are attached to β clamps on the leading and lagging strands, creating a loop. Primase binds to DnaB helicase and synthesizes an RNA primer (purple). The clamp loader assembles a β clamp onto the new RNA primer. The second laggin The first laggin