"Cell fractions" refers to the different components or parts that make up a cell. They are obtained by separating the cell into different parts for further study or analysis. Full definition
When primary cultures from these mice are stimulated with proinflammatory cytokines, the endothelial cell fraction responds by up - regulating the inducible endothelial cell adhesion molecules, E-selectin and VCAM - 1. (cancerres.aacrjournals.org)
The cytosolic cell fraction from Arabidopsis thaliana was isolated and analyzed using offline strong cation exchange liquid chromatography and liquid chromatography - tandem mass spectroscopy. (jbei.org)
Quantitative PCR analysis was performed to compare transcript levels of Venus with PrEn (Hex, Gata4, Gata6, Dab2, Sox7, Hnf4α, and Pdgfrα), pluripotency (Nanog, Klf4, Rex1, Stella, and Pou5f1) and other lineage (T, Fgf5, Eomes, Flk1, Mixl1, Cdx2, Sox1, Pax6, and Six3) markers in purified cell fractions. (journals.plos.org)