13.1 Introduction 13.2 DNA polymerases are the enzymes that make DNA 13.3 DNA synthesis is semidiscontinuous 13.4 Coordinating synthesis of the lagging and leading strands 13.5 The replication apparatus of phage T4 13.6 Creating the replication forks at an origin 13.7 Common events in priming replication at the origin 13.8 Does methylation at the origin regulate initiation? 13.9 Licensing factor controls eukaryotic rereplication