4FAK:
reference: Characterization of the Staphylococcus aureus rRNA Methyltransferase Encoded by orfX, the Gene Containing the Staphylococcal Chromosome Cassette mec (SCCmec) Insertion Site., Boundy S, Safo MK, Wang L, Musayev FN, O'Farrell HC, Rife JP, Archer GL, J Biol Chem. 2013 Jan 4;288(1):132-40. doi: 10.1074/jbc.M112.385138. Epub 2012, Nov 13. PMID: 23150671

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