In mammals, piRNAs are found both in testes and ovaries, although they only seem to be required in males.0 b; {( i. \ ~9 }
In invertebrates, piRNAs have been detected in both the male and female germlines. * j& O O6 }; e" g. Q4 H在哺乳动物和非脊椎动物(如昆虫)中不太一样,哺乳动物中,主要是在精巢中发挥作用;2 Z! s' Y: Y, i1 P- Y+ z0 o- P
在昆虫,如果蝇中,在精巢和卵巢中,都有。