Figure 6From: Biochemical heterogeneity, migration, and pre-fertilization release of mouse oocyte cortical granulesThe sperm-binding assay showing a three-dimensional projection of an oocyte incubated in vitro with a saturating number of sperm. Small areas devoid of bound sperm were found randomly on the zona (arrows). Occasionally, similar "bald spots" were observed above the spindle (*), as shown in this figure.Back to article page