PEX3 and PEX19 are highly abundant in the testis and are present in germ and somatic cells.

<p><b>A:</b> Overview of the PEX3 staining in germ and Sertoli cells of a seminiferous tubule. <b>B:</b> Distribution of PEX3 in Leydig cells. <b>C:</b> Higher magnification of PEX3-labelled peroxisomes in the basal part of a seminiferous tubule. <b>D:</b> Colocalisation of PEX3 and PEX14 in the germinal epithelium. <b>E:</b> Overview of the PEX19 staining in different cell types of a seminiferous tubule and interstitial Leydig cells. <b>F:</b> Higher magnification of PEX19 staining of the basal layer of the germinal epithelium. <b>Nuclear staining:</b> in Figs A-F with Hoechst 33342. <b>Abbreviations:</b> Sc, Sertoli cells; SpG, spermatogonia; SpC, spermatocytes; Spt, spermatids; Lc, Leydig cells; Pc, peritubular cells. <b>Scale bars</b> = 15 μm.