Fig. 1.

Profiles of total RNA isolated from fractionated extracts from prepuberal and adult mouse testes. (A) Adult testis extracts were fractionated by sucrose gradient centrifugation and aliquots (1/5 volume) of purified RNA were used for Northern blot analysis with probes for Prm2 and Clu. (B) Distribution of RNA in the fractionated extracts from prepuberal and adult mouse testes. Open bars indicate RNA from testes of 17-day-old mice, gray bars indicate RNA from testes of 22-day-old mice, and black bars indicate RNA from testes of adult mice. The gradient bottom is to the right.