The midpiece of spermatzoa in nearly all vertebrates is enclosed in a sheath of mitochondria, which provide a ready source of ATP necessary for sperm motility. Here, a longitudinal section through sp...

The pellicular pore consists of the invaginated plasma membrane that penetrates the alveolus as well as the epiplasm and ends as a clathrin-coated pit. TEM taken on 3/14/72 by R. Allen with Hitachi HU...

NMDA receptors (NMDARs) can exit the Golgi/TGN via clathrin-coated vesicles. Double-labeling using rabbit polyclonal antibodies to AMPA receptors (AMPARs) (combination of 3 antibodies: GluR1, GluR2, G...

The contractile vacuole of Coleps hirtus. The filled CV is continuous with tubules of the smooth spongiome. The tubular nature of mitochondrial cristae is particularly evident in this micrograph. Stan...

High resolution micrograph of the contractile vacuole of Coleps hirtus. The filled CV is continuous with tubules of the smooth spongiome. The tubular nature of mitochondrial cristae is particularly ev...

Cross fracture of cilia of the quadrulus. The basal body/cilium complexes are a little less tightly packed than in the peniculus. There are four or five rows of parasomal sacs interspersed with basal...

Intracellular localization of GFP-Vps74 in BY4742 sac1∆ vps74∆. SAC1 encodes an integral membrane phosphoinositide phosphatase that is localized to the ER and Golgi. In the sac1∆ vps74∆ mutant...

Tubules within the cristae of mitochondria can sometimes take on unusual configurations. Here, in the upper panel, a mitochondrion from an astrocyte in hamster brain appears to have prismatic tubules...

High resolution view of early endosomes with coated evaginations at their margins.TEM taken on 8/15/67 by R. Allen with Philips 200 operating at 60kV. Neg. 19,200X. The raw film was scanned with an E...

The decorated spongiome of the CVC is composed of 50nm tubules that have a pattern of helically wound subunits attached to their cytosolic surfaces. These tubules can be up to one micrometer or more i...