Vegetarian diets can are available in three forms: vegan, lacto-vegetarian, and lacto-ovo-vegetarian. The enzymes involved in lysine methylation were first found to focus on histone and thus had been initially named histone methyltransferases and histone demethylases, following the naming model for histone acetyltransferase and histone deacetylase.

In order to replicate, the herpes virus requires arginine , another amino acid that's common in foods and necessary to human life