CD34+ Cell Marker Expression Analysis - U.S. Patent 5,980,887 Figure 3 #96593 (License: Personal Use)

This patent figure presents 15 flow cytometry histograms organized in a 5×3 grid, quantifying fluorescence intensity (x-axis) against relative cell number (y-axis) for five surface markers (CD45, CD34, CD31, Flk-1, Tie-2) across three cell sources (MB CD34+, AT CD34+, HUVEC). Each histogram includes mean fluorescence intensity ± standard deviation, revealing distinct expression profiles-e.g., high CD45 in MB, strong CD31/Tie-2 in HUVEC, and variable Flk-1 in AT-supporting the identification of progenitor cell subsets.

Used in scientific publications, patent documentation, or biotech product pages to illustrate cell surface marker validation for hematopoietic/endothelial progenitor isolation; targets researchers, clinicians, and IP analysts seeking evidence of marker specificity in stem cell therapeutics.