| Type | MGI:General | Description | acrosome biogenesis is disrupted as early as in the Golgi phase, with spermatids showing a less uniform and sparser PNA staining with no formation of a single homogeneous structure in the cap phase, spermatids show a punctate PNA staining along the nuclear surface rather than the typical cap-like layer enveloping the nucleus seen in wild-type cells in the acrosome phase, PNA staining appears disarranged and absent in many cases; a similar pattern is also seen in the maturation phase |