1 If you have lichen planus of the skin that's causing itchiness, antihistamines may be prescribed to help reduce this. 2  Light treatment â there are two types of light treatment: ultraviolet B (UVB) and psoralen plus ultraviolet A (PUVA).
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DNA helicase is an enzyme that unwinds the DNA double helix by breaking the hydrogen bonds between the complementary bases. It's easy to remember the name because it has part of the word helix in it. You can imagine it sort of as a wedge that forces apart the two strands, just like the slider on a zipper wedges apart the two long rows of teeth.