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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What enzyme unwinds DNA? A: The powerful enzyme DNA helicase unwinds the double strands of DNA by breaking the bonds between each of the complementary bases. These bases are held together by strong hydrogen bonds, but in breaking these, DNA helicase creates two single-stranded DNA molecules. Continue Reading.