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Fig. 8. Ventral yolk sac melanocytes fail to regenerate following melanocyte
ablation by MoTP treatment. (A) Larval melanocytes were counted in
the untreated larvae (blue line) and MoTP-treated (14-72 hpf) larvae (red
line). After the appearance of melanocytes at 24 hours post-MoTP treatment,
the number of melanocytes continues to steadily rise in the ensuing 4 days and
then plateaus at approximately 350-400 melanocytes by 9 dpf (6 days after
removal of MoTP). (B-E) At this stage of melanocyte regeneration,
MoTP-treated larvae (C,E) have regenerated almost identical pigment patterns
to those of the untreated larvae (B,D), with a similar number and distribution
of melanocytes in the dorsal, lateral and ventral larval melanocyte stripes
(white arrowheads). However, MoTP-treated larvae fail to regenerate the
majority of the ventral yolk sac melanocytes (white arrow in C and E). Scale
bars: 500 µm.
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