Biochemical genetics of TL antigens

Autor: Fung Win Shen, Ulrich Hämmerling, James S. Michaelson, Lisa Ciccia, Lorraine Flaherty, Edward A. Boyse, Ellen Garnick, Peter Mauch, Erwin Fleissner, Mark Lawrence
Rok vydání: 1986
Předmět:
Zdroj: Immunogenetics. 24:103-114
ISSN: 1432-1211
0093-7711
DOI: 10.1007/bf00373117
Popis: TL antigens are class I glycoproteins which are expressed on thymocytes and which are coded by the Tla region of the major histocompatibility complex of the mouse. Biochemical analysis of TL molecules from different strains of mice revealed structural variation determined by the Tla region which is detectable by peptide mapping, isoelectric focusing, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, two-dimensional gels, and by differential reactivity of allelic forms of TL molecules with a panel of anti TL reagents. The quantity of TL expressed on thymocytes is also influenced by the Tla region; three quantitative phenotypes were identified: high (Tlaa, Tlad, Tlac), intermediate (Tlac, Tlaf), and low (Tlab). (Relative amounts: 1000 : 100 : 1.) Some thymic leukemias arising in (Tlab, Tlac, Tlac) mice with genetically determined reduced levels of thymic TL were found to express TL molecules which were structurally indistinguishable from TL isolated from thymocytes but were present in larger amounts. This suggests that TL structural genes are intrinsically capable of full expression in all mice but that the Tla region of mice expressing an intermediate or low quantity of TL is marked by some feature which causes the thymocyte to express less than the full amount of TL possible.
Databáze: OpenAIRE
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