Boots Rapid Ibuprofen Lysine 342 mg Tablets for fast acting pain reduction. Kasper B, Lauridsen TB: Optimizing the identification of citrullinated peptides by mass spectrometry: using the lack of trypsin to cleave after citrullinated amino acids. The exception to the rule is the DOT1 family, members of which methylate K79 in the globular area of histone H3 and which are structurally not associated to SET-domain proteins four - 6 Current work suggests that SET-domain-containing proteins methylate a couple of proteins along with histones (see later)