Rat α4 expression as compared with the β2 integrins, CD3, and L-selectin. Indirect immunofluorescence and flow cytometric analysis of the surface expression of α4 (TA-2), CD11a, CD11b/c, CD18, CD3, and L-selectin on rat neutrophils (PMN, ▪), lymphocytes (LYMPH, ▨), monocytes (MONO, □), and eosinophils (EOS, ▧). Data are presented as in Fig 1 (n = 5).