Differentiating Stem Cell From Cord Blood #3
by Dennis Kunkel Microscopy/science Photo Library
Title
Differentiating Stem Cell From Cord Blood #3
Artist
Dennis Kunkel Microscopy/science Photo Library
Medium
Photograph - Photograph
Description
Differentiating stem cell (CD34+) from umbilical cord blood, scanning electron micrograph (SEM). Shown here is the first stage of a CD34+ stem cell differentiating in to another blood cell type. Note the new protoplasmic bulge forming at one position on the stem cell periphery; this new growth extension of the cell is the first morphological sign of the stem cell developing in to another cell type. CD34+ stem cells are normally found in the umbilical cord and bone marrow as hematopoietic stem cells. They are multipotent; they differentiate to produce precursor (progenitor) cells of any of the body's blood cell types. This process of stem cell differentiation in the circulatory system is called hemopoiesis. CD34 is a cell surface glycoprotein and functions as a cell-cell adhesion factor. Magnification: x2,600 when shortest axis printed at 25 millimeters.
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September 24th, 2018
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