Tautomerization of L-dopachrome with decarboxylation to give 5,6-dihydroxyindole (DHI). Also catalyzes the tautomerization of the methyl ester of L-dopachrome and dopamine chrome. May play a role in melanization reactions during late pupal and adult stages. May play a role in melanization reactions during larval and early pupal stages. L-dopachrome = 5,6-dihydroxyindole-2-carboxylate Pigment biosynthesis; melanin biosynthesis. Expressed in larvae and pupae, with highest levels in later larval and early pupal stages. Very low expression in 1-day-old adults. Incomplete sequence. Belongs to the major royal jelly protein family. Truncated N-terminus.