Figure 6From: Control of cell migration in the development of the posterior lateral line: antagonistic interactions between the chemokine receptors CXCR4 and CXCR7/RDC1Early expression of sdf1a and primordium migration. A: At 22 hpf a thin stripe of cells along the horizontal myoseptum begins to express sdf1a. Dotted outline of the primordium derived from panel B. B: in the same embryo but in a slightly more superficial focal plane the primordium extends posteriorly and overlays the tip of the sdf1a stripe.Back to article page