Sulfate transport by mouse renal cortical slices does not represent uptake by brush-border membrane.

We measured uptake of isotopically 35S-labelled sulfate anion by slices and by brush border membrane vesicles prepared from mouse renal cortex to identify: (i) whether metabolic incorporation of anion influences net transport; (ii) which membrane is primarily exposed in the renal cortex slice. Slices accumulated sulfate without significant incorporation into metabolic pools. Net uptake of sulfate at 0.

Double labelled T suppressor lymphocytes in the thymus of a patient with myasthenia gravis: morphological and immunological characteristics.

Double labelled lymphocytes were prevalent in the thymus of a 32-year-old woman with myasthenia gravis. The simultaneous presence of both E and C3b surface receptors was demonstrated. Focal paranuclear acid phosphatase activity of the cells supported their T cell origin.