KLRA1P and T-cell non-Hodgkin lymphoma: To test this hypothesis, fragments from this region were inserted upstream of the luciferase gene in the promoterless pGL4 vector and transfected into EL4, a T cell lymphoma line that frequently but not always expresses Ly49A and Ly49G [32], and which has been used in all previous studies of Ly49 gene promoters [17], [19], [20], [21].