Complex sentence: For example, enhancers increase transcription by binding an activator protein which then helps to recruit the RNA polymerase to the promoter; conversely silencers bind repressor proteins and make the DNA less available for RNA polymerase.
Split into simpler sentences: For example, enhancers increase transcription by binding an activator protein which then helps to recruit the RNA polymerase to the promoter. Conversely silencers bind repressor proteins and make the DNA less available for RNA polymerase.