Fig. 3. Immunocytochemistry of occludin, claudin-1 and ZO-2 (A) and cytokeratin 8 (B) proteins in the periimplantation mouse uterus. Photomicrographs of representative uterine sections on days 4-6 of pregnancy are shown at 100x magnifications. TROMA-1 antibody recognizes cytokeratin-8 protein. Am, antimesometrial side; bl, blastocyst; em, embryo; ge, glandular epithelium; le, luminal epithelium; m, mesometrial side; myo. myometrium; pdz, primary decidual zone; s, stroma; sdz, secondary decidual zone. Scale bar: 400 µm.