Fig. 7
From: A molecular basis for spine color morphs in the sea urchin Lytechinus variegatus
Top row, live adult spines labeled with the lectins Concanavalin A (Green) and Wheat germ agglutinin (Red). Note distinct boundaries in the epithelium expressing a rich source of terminal α-D-mannosyl and α-D-glucosyl groups, or to N-acetyl-D-glucosamine and sialic acid, respectively. Bottom row are spines from a 2-week old juvenile, similarly labeled and showing that the distinct domains seen in adults are already formed in a young juvenile. The WGA labeling appears predominantly pericellular at this stage.
