In wild-type animals,
tlp-1 expression is often asymmetric; it is expressed in the T.p cell, but not in the T.a cell.
tlp-1::gfp expression was rarely observed in the T cell daughters in
tcl-2 mutants. Specifically, after the division of the T cell, only 4% of T cell lineages showed GFP expression; 0% showed GFP expression in T.a alone, 2.7% showed expression in T.p alone, and 1.4% showed expression in T.a and T.p, suggesting that
tcl-2 functions upstream of
tlp-1.