Fig. 2.

Phenotypes displayed by hen and quail oviduct cell colonies in vitro. a–b: confluent monolayers and visible spheres of colony-initiating cells isolated from the region of infundibulum neck (INF); magnification: × 100. c–d: confluent monolayers of epithelial cells isolated from distal magnum (DM), showing typical cobble-like morphology; magnification × 100. e–f: confluent epithelial monolayer, typically observed in cultivated cells that are originating from the oviduct magnum, showing mostly fibroblast-like morphology; magnification × 100. In each case, the cells were seeded at a density of 4 × 10⁴ cells/cm²