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TY - JOUR AU - Michaelson, James AU - Boyse, Edward A. AU - Ciccia, Lisa AU - Flaherty, Lorraine AU - Fleissner, Erwin AU - Garnick, Ellen AU - Hämmerling, Ulrich AU - Lawrence, Mark AU - Mauch, Peter AU - Shen, Fung Win PY - 1986 DA - 1986/08/01 TI - Biochemical genetics of TL antigens JO - Immunogenetics SP - 103 EP - 114 VL - 24 IS - 2 AB - 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. SN - 1432-1211 UR - https://doi.org/10.1007/BF00373117 DO - 10.1007/BF00373117 ID - Michaelson1986 ER -