Figure 1
From: The extracellular matrix of porcine mature oocytes: Origin, composition and presumptive roles
TEM of the PVS of pig oocytes matured in vitro until MII. In the PVS, the ECM appears as a meshwork of fibrils (f) after tannic acid treatment (a) or as a meshwork of fibrils (f)and attached granules (g) after ruthenium red treatment (b). In the latter case, granules are also visible on the inner side of the ZP (Z). Part of the first polar body (PB) containing cortical granules is visible in (a); these granules (CG) are contrasted in both cases. bar = 0.5 μm