Fig. 1.
Identification of myeloid progenitors in murine fetal liver.
(A) Live, Lin−IL-7R−AA4.1− cells were gated and analyzed for expression of the c-Kit and Sca-1 surface markers. The Lin−IL-7R−AA4.1−Sca-1−c-Kit+fraction was subdivided into FcγRloCD34+, FcγRloCD34−, and FcγRhiCD34+ populations. Percentages of each population relative to whole FL are shown next to each sort gate. (B) Reanalysis of sorted populations. Each was isolatable to purity after 2 consecutive sorts. (C) Cellular morphology of sorted populations (60 × magnification, Giemsa/May-Grünwald staining). Note the unusual cytoplasmic protrusions of FcγRloCD34− cells and the presence of myelomonocytic characteristics in FcγRhiCD34+cells.