Words similar to subpopulations
Example sentences for: subpopulations
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This method allows for the clear determination of type I and IIa fibers, but distinguishing IIb from IId/x subpopulations is difficult and subjective as both stain with nearly the same intensity.
With a normal mixture model-based approach to clustering, it is assumed that the data to be clustered are from several subpopulations (or clusters or components) with distinguished normal distributions.
Decreases in some of the subpopulations in peripheral blood may indicate that there is a selective migration of these cells out of the peripheral blood, decreased survival of these cells, or blockade in their differentiation.
It is known that during clonal selection in the thymus, immature CD4, CD8 double positive cells develop into single positive CD4 or CD8 cells according to the relative affinity of their TCR to class II or class I molecules respectively [ 5 6 ] . These immature T-cells are selected in the thymic epithelium on the basis of their TCR interaction with either class I or class II MHC molecules [ 7 8 ] , thus generating two mutually exclusive subpopulations that are characterized by the expression of either CD4 or CD8 glycoproteins [ 9 ] . Earlier studies in the murine system have demonstrated that PMA and cAMP can modulate the expression CD4 and CD8 on developing thymocytes [ 10 11 12 13 ] . In keeping with these findings, ex vivo experiments with human thymocytes previously reported by our group, revealed that while phorbol esters can coordinately regulate the transcription of α and β TCR during intrathymic T cell differentiation [ 14 ] , cAMP selectively affected the transcription of the α and δ-TCR [ 15 16 ] . Together the murine data and our own findings support the hypothesis that in humans, TCR expression and CD4, CD8 commitment and selection may be regulated by the same signal-transduction pathways.
Logical gate 2 (R1+R2+R3) events were analyzed for cytokine production by CD28 +(FL2) or CD28 -subpopulations by plotting two dimensional contour plots.
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