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. 2017 Feb 22;19(2):259–268. doi: 10.22074/cellj.2016.3916

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Fig.1 — Presence of human hair stem cells in human scalp samples. A. Longitudinal section of human anagen hair showed CD200 and K15 expressions in the outermost (ORS) layer of human hair. CD200 expressed between the insertion point of the arrector pili muscle (APM) and the sebaceous gland (SG). K15 expressed in the bulge and inferior of the bulge area (sub bulge). White arrows show APM, SG, B. CD200 expressed between the APM and SG. Dotted square represents CD200 expression, C, D. Magnified CD200 expression area, E. K15 expressed in the bulge and inferior of the bulge area (sub bulge). Dotted square represents K15 expression, F and G. Magnified K15 expression area. Nuclei were stained with DAPI (scale bar: 50 μm).