 What classes of histones are found as a pair in the nucleosome?
 The two classes of histones found as a pair in the nucleosome are H2A and H2B.
H2A and H2B form a dimer, which is the basic unit of the nucleosome. This dimer is then wrapped around by DNA to form the nucleosome.
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<|USER|> What classes of histones are found as a pair in the nucleosome?
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 The two classes of histones found as a pair in the nucleosome are H2A and H2B.
H2A and H2B form a dimer, which is the basic unit of the nucleosome. This dimer is then wrapped around by DNA to form the nucleosome.
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