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. 2001 May 28;153(5):1133–1140. doi: 10.1083/jcb.153.5.1133

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© 2001 The Rockefeller University Press

This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).

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Representative immunophenotype of blood-derived adherent cells. Although two morphologically distinct types of cells were detected in three of the four animal species, their immunophenotype was identical, and this did not vary significantly from one species to another. Their similarity to marrow stromal cells is demonstrated by their expression of (A) type I collagen, (B) fibronectin, (C) osteonectin, and (D) α-smooth muscle actin, and variable expression of (E) osteopontin and (F) bone sialoprotein.