One, it lowers the severity of the condition especially when there's an outbreak of chilly sores. L-lysine is an amino acid (a building block of protein) that's essential for well being. The exception to the rule is the DOT1 household, members of which methylate K79 in the globular region of histone H3 and which are structurally not associated to SET-domain proteins four - 6 Latest work means that SET-area-containing proteins methylate a number of proteins in addition to histones (see later)