FIG. 3.

Hematoxylin-eosin staining of experimental mouse testes and caudae epididymides. A) Testes cross-sections from wild-type (WT), null, and E-line rescue mice were stained with hematoxylin-eosin. The stained sections were viewed with an Olympus IX70 microscope at 20× and 40× magnifications. Note the seemingly wild-type architecture of the rescue testis at these magnifications. B) Hematoxylin-eosin stained cross-sections through the lumina of the caudae epididymides from wild-type, null, and E-line rescue mice were viewed with the Olympus IX70 microscope at 40×. Note the dearth of sperm in the null epididymis.