Abstract
Phosphatidylserine (PS) and phosphatidylcholine (PC) multilamellar vescicles (MLV) affect chromatin structure as analysed by DNase I sensitivity. The kinetics of DNA sclubilisation during the digestion of nuclei indicates that Phosphatidylserine causes an increase in DNase accessibility while phosphatidylcholine slightly reduces this accessibility. The effect of Phosphatidylserine has also been analysed by means of isokinetic sucrose gradients and agarose gel electrophoresis of nuclear DNA solubilised by micrococcal nuclease. This analysis indicates that Phosphatidylserine induces a very rapid production of mononucleosome subunits as compared with untreated nuclei.
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