Abstract
IT has been shown1 that the crustacean cuticle undergoes at each moult a tanning process similar to that taking place in insects. Tyrosine and tyrosinase, which are involved in the tanning of the insect cuticle, are known to occur also in the blood of decapod Crustacea2,3, and it is therefore of interest to discover whether as in insects there exists a neurosecretory regulatory mechanism for the control of tyrosinase activity in relation to moulting. In the blowfly larva, the oxidation of tyrosine under the influence of tyrosinase activity is modified by the low redox potential of the blood resulting from the action of a glucose dehydrogenase, itself controlled by Weismann's ring, a complex gland near the brain4.
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KRISHNAN, G. Sinus Gland and Tyrosinase Activity in Carcinus mœnas. Nature 165, 364–365 (1950). https://doi.org/10.1038/165364b0
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DOI: https://doi.org/10.1038/165364b0
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