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CD45 expression on surface IgM+ cells in ovine fetal thymus, spleen, and PB during gestation. Surface IgM expression is noted earliest in thymus followed by spleen and PB. a Dot plots showing expression of CD45 and sIgM in thymus, spleen, and PB. Quadrants were individually determined based on isotype control binding for each organ at each gestational age. Primary isotype controls are shown. b Cumulative data on CD45 expression of sIgM+ on thymic and splenic cells.
