FIG. 3.

Characterization of Fyn-null sperm morphology is shown. Cauda epididymal sperm from Fyn-null and WT males were fixed and prepared for SEM as described in Materials and Methods. Normal heads (NH) and tails (NT) and abnormal heads (coded, H1–H3) and tails (coded, T1–T5) were coded as described in Materials and Methods. A) A representative SEM image from samples of Fyn-null or WT sperm is shown. B) Examples of coded groups used to categorize head (H) and tail (T) morphologies are shown. Bar = 6 μm. Percentages of Fyn-null and WT sperm classified within each coding group are summarized in Table 2.