mcd99In contrast, the anti-mCD99 antibody recognizes the mCD99-Fc used to immunize the rabbits (arrowhead, running at the expected M r of ∼ 75 kD). Display full size. Fure 4Characterization of the interaction between mCD99 and mCD99L2. (A) Diagram of the DNA constructs for the expression of mCD99 or mCD99L2 proteins tagged with Myc, Flag,