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helicase
unwinds the parental double helix at replication fork
single-stand binding protein
binds to and stabilizes single-stranded DNA until it’s used as a template
topoisomerase
relieves overtwisting strain ahead of the replication forks by breaking, swiveling, and rejoining DNA strands
primase
synthesizes RNA primer at 5’ end of leading strand & at 5’ end of Ozaki fragment of lagging strand
DNA pol III
uses parental DNA as template to synthesize new DNA stands by adding nucleotides to an RNA primer or pre-existing DNA strand
DNA pol I
removes RNA nucleotides of primer from 5’ end & replaces them with DNA nucelotides
DNA ligase
joins Okazaki fragments of lagging strand; on the leading strand it joins 3’ end of DNA that replaces the primer to rest of the leading DNA strand