Unwinding of DNA is done by
In addition to binding to the nucleosome, the H1 protein binds to the "linker DNA" (approximately 20-80 nucleotides in length) region between nucleosomes, helping stabilize the zig-zagged 30 nm chromatin fiber Ref-Sathyanarayana 4/e p360
DNA polymerase
DNA primase
Helicase
DNA ligase
Metabolism of nucleic acids