Staphylococcus aureus chemical properties

Protein A (PA) is a cell wall component produced by over 98% of the strains of Staphylococcus aureus that have been tested. It was reported first by Verwey, then rediscovered by Jensen nearly two decades later Its name emphasizes the chemical class, since PA originally was believed to be a polysaccharide, but shown later to be a protein with little or no carbohydrate. The outsmnding functional property of PA is its ability to bind specifically to the Fc region of immunoglobulin molecules, especially... 

The two preparations from H. perforatum, novoimanine, the 0.25% aqueous alcoholic solution, and imanine, the water soluble fraction showed antibacterial properties against Staphylococcus aureus [93], Chemical analysis of novoimanine showed that the main extractives consisted with phenolic glycosides of low polarity [94]. 

Menaquinone-n (MK ), or vitamin K2( ), stands for 2-methyl-3-multiprenyl-1,4-naphthoquinone, where n indicates the amount of isoprene units in the side chain, a number naturally between 4 and 13. Sometimes one (or more) of the double bonds in the side chain is saturated. Physical and chemical properties of menaquinones are similar to those of VKl, with the exception of the lipohilic character, due to different design of the side chain. MK s are formed by bacteria (e.g., Escherichia coli. Staphylococcus aureus, Eubacterium lentum etc.) of the intestine, the most common configuration is -trans. Other stores of MK s were found to be animal liver (mainly MK7-13) and bone (5). 

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