Patched (Ptc, green) is expressed in most cells of the Drosophila wild-type germarium including follicle stem cells. Hedgehog (Hh, red) accumulates on the surface of the apical cells. Germ cells are i...

Boi (green) and Hedgehog (Hh, red) are expressed in apical cells of the Drosophila wild-type germarium. In the absence of boi (boi[e] mutant), Hh is redistributed from apical cells to the extracellula...

Smoothened (Smo; green), a downstream effector of Hedgehog (Hh), is expressed in most cells of the wild-type Drosophila germarium including follicle stem cells, but is excluded from Boi- and Hh-expres...

Figure 232 from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Dividing mitochondria in gasric mucosa of a mole. Upper panel, the bilaminar septum as formed, but the outer me...

Transmission electron micrograph showing collagen fibrils in longitudinal view from a patient with glaucoma. The a-e banding is visualized by uranyl acetate staining of charged amino acid residues in ...

Figure 296 from Chapter 11 (Melanin Pigment) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Melanocyte at the dermoepidermal junction, flanked by portions of two adjacent epithelial cells from African...

Figure 386 from Chapter 15 (Cytoplasmic Inclusions) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Exocytosis in a mucus-secreting cell from the colon. Image by Marian Neutra and Robert Specia. A PDF...

Cryopreserved human mammary epithelial cells were revived and stained for cytokeratin 18 (in red) to reveal the keratin-containing intermediate filaments found in the intracytoplasmic cytoskeleton of ...

Cytoplasm of a green Trichodina that lives on the surface of a freshwater snail collected in central Illinois. In this view the abundant endosymbiotic zoochlorellae and a single endosymbiotic bacteriu...

Transmission electron micrograph of thin section of rat liver with prominent Golgi and smooth ER associated vesicles. At lower right, the junction between hepatocytes harbors a bile canaliculus. The i...