The presence of A1CF protein in 129/Sv gonads. (A) The presence of A1CF protein in epididymides, testes, and ovaries and in muscle and liver (referents for low and high expressions of A1CF, respectively) of 129/Sv females and males at P0, P21, and P70. The same image is used for testes and epididymides at P0. Negative (isotype control) is presented only for P21 samples. (Magnification: 40×.) (Scale bars, 100 μm.) (B) Boxed areas in A are magnified 10×.