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Fig. 2. Dextran injections. (A-C) A two-cell stage embryo 60 minutes after
injection with tetramethylrhodamine dextran into a single blastomere. Dye has
diffused into both blastomeres. (D-F) A four-cell stage embryo 60 minutes
after injection with tetramethylrhodamine dextran. Dye remains localised in
the injected blastomere. (G-H) A 16-cell stage embryo 60 minutes after
injection with tetramethylrhodamine dextran. Dye remains localised in the
injected blastomere. Scale bars: 20 µm.