Testis squashes and immunostaining were performed as previously described (Kearse et al., 2011 (link)). Briefly, testis tissue was squashed with a #1 coverslip onto a glass slide and immediately frozen on dry ice. Tissue was fixed in ice-cold ethanol and 4% formaldehyde and washed two times in PBST with sodium deoxycholate (1X PBS, 0.3% sodium deoxycholate, 0.3% Triton X-100) and one time in PBST. Tissue was then incubated overnight in primary antibody, washed four times in PBTB (1X PBS, 0.1% bovine serum albumin [BSA], 0.1% Triton X-100), and incubated for 1 h in secondary antibody. Tissue was washed four times in PBTB, followed by two times in 1X PBS and mounted using Fluormount-G (Southern Biotech; #0100-01). Imaging was completed using a Nikon Eclipse TE200U.