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Detection of DAZ mRNA transcripts in human testis and in a Dazl−/+;TgS12 mouse by in situ hybridization. Abundant silver grains were present within the seminiferous epithelium (∗) of human (b, positive control) and the Dazl−/+;TgS12 transgenic mouse (a). Most mRNA appeared to be localized in pachytene spermatocytes (arrows). As expected, no DAZ mRNA was detected in wild-type mice (c).
