IHC analysis of CD133, OCT4, SSEA1, SSEA4 and SOX2 in xenografts from different cell fractions. A. IHC analysis of CD133, and the stem cell related transcription factors OCT4, SSEA1, SSEA4 and SOX2 in parental LC-42 cells, corresponding xenograft, and xenografts derived from CD133high and CD133dim cells. The xenografts resemble their parental LC-42 cells for the expressions of CD133, OCT4, SSEA1, SSEA4 and SOX2. B. IHC analysis of CD44 expression in 4 lung cancer cell lines LC-42, HTB-182, EKVX and SELS. All the representative images are at 40× magnifications.