hiwi is expressed in human CD34⁺ cells but not in CD34⁻ hematopoietic cells.

Electrophoretic gel shows positive signal for hiwi in CD34⁺ sample and no signal in CD34⁻ sample by semiquantitative RT-PCR. Lane 1, 123-bp DNA ladder; lane 2, CD34⁺ sample; lane 3, CD34⁻ sample; lane 4, negative control (water) PCR reactions; lane 5, positive control (human testis, 269 bp).