hASCs and FP-ASCs display similar multipotency and immunophenotypes. (A) Panels show microphotographs of FP-ASC and hASC cultures, and their staining with alizarin S and oil red O, following induction to the osteogenic and adipogenic lineages, respectively. (B) The histogram compares the fraction of cells that express the indicated cell surface markers in hASCs (PD 10) from three different patients, with the corresponding early (PD 9) and late (PD 18) passage FP-ASCs. For analysis, CD markers were labeled using the corresponding fluorescence-conjugated antibodies and detected by FACS (n=3, t-Student compared with hASCs for each marker: *P<0.05; †P<0.01; error bars, SD). FP-ASCs, fast-proliferating phenotype; PD, population doubling. Color images available online at www.liebertpub.com/scd