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Class I includes HDAC1, 2, 3, and 8, which are usually localized in the nucleus, have deacetylase activity, and contain zinc-dependent active sites ( + as a cofactor ( Table 1 ) ( Figure 1 ) ( Table 1 Classification of HDACs based on homology to human yeast homologs and generalization of their cofactor, size, and cellular localization
Some practitioners inject near injury site (local administration) versus systemic injection, though evidence for superiority of local injection limited
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