Antigen processing and intracellular Ia. Possible roles of endocytosis and protein synthesis in Ia function.


Anti-I-A mAb and monovalent Fab fragments were used to explore the cellular distribution and endocytosis of I-A in peritoneal exudate cells (PEC) and TA3 B lymphoma-hybridoma cells. TA3 cells contained 1.6 x 10(5) I-A sites/cell, 22 to 35% of which were intracellular. This intracellular pool was cycloheximide resistant. PEC contained 1.8 x 10(5) I-A sites… (More)


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