Journal of ultrastructure research.
Discontinued
Publisher:
Academic Press. New York Ny : Academic Press
Frequency: Monthly
Country: United States
Language: English
Start Year:1957 - 1985
Identifiers
| ISSN: | 0022-5320 (Print) 0022-5320 (Linking) |
| NLM ID: | 0376344 |
| (DNLM): | J41000000(s) |
| (OCoLC): | 01680952 |
| Coden: | JULRA7 |
| Classification: | W1 JO968D |
Caveolar system of the articular chondrocyte. Tangential articular chondrocytes contain a complex system of membrane invaginations called caveolae. Caveolae are about 600 A in diameter, open to the extracellular space, and may attract and sequester calcium ions. On the average each chondrocyte has approximately 17 700 caveolac. This chondrocytic caveolar system appears remarkably similar to the caveolar system of smooth muscle cells, and it is proposed that chondrocytic caveolae may contribute to an excitation-contraction coupling mechanism similar to the mechanism in smooth muscle cells.
The fine structure of equine papillomas and the equine papilloma virus. Combined light and electron microscopy were used to follow the sequence of virus development in equine papillomas. The deepest layer in which virus was observed was the stratum spinosum of the epidermis. In this layer virus was scattered throughout the nuclei and was occasionally found in association with the nucleolus. In the stratum granulosum virus particles were more numerous, often forming isolated nuclear aggregates. Virus inclusions observed in the stratum granulosum by electron microscopy were correlated with nuclear inclusions seen by light microscopy. In the stratum corneum closely p...