Mandibular organ

Li S., C.A. Wagner, J.A. Freisen, and D.W. Borst (2003). 3-Hydroxy-3-methylglutaryl-coenzyme A reductase in the lobster mandibular organ Regulation by the eyestalk. General and Comparative Endocrinology 134 147-155. 

The mandibular organ-inhibiting hormone of the crab Cancer pagurus produces two neurohormones that inhibit the secretion of methyl famesoate, which is thought to function as the juvenile hormone in crustaceans 357... 

Mandibular organ-inhibiting hormone Canpa MOIH-1 Cancer pagurus... 

Herring PJ, Morris RJ (1975) Embryonic metabolism of carotenoid pigments and lipid in species of Acanthephyra (Crustacea Decapoda). In Barnes H (ed) Proc 9th European Marine Biology Symp. Aberdeen University Press, Aberdeen, pp 299-310 Hessler RR, Newman WA (1975) A trilobitomorph origin for the Crustacea. In Martinsson A (ed) Fossils and strata. No. 4, Universitets Forslaget, Oslo, pp 437-457 Hinsch GW (1980) Effects of mandibular organ implants upon the spider crab ovary. Trans Am Microsc Soc 99 317-322... 

Ding, Q. and Tobe, S.S. (1991) Production of farnesoic acid and methyl farnesoate by mandibular organs of the crayfish, Procambarus clarkii. Insect Biochem., 21, 285-291. 

Tobe, S.S., Young, D.A, and Khoo, H.W. (1989a) Production of methyl famesoate by the mandibular organs of the mud crab, Scylla serrata validation of a radiochemical assay. Gen. Comp. Endocrinol., 73,342-353. 

The polyketide synthases of micro-organisms are rather unspecific for their substrate and supplying them with a slightly different substrate from the normal can induce them to make different products. If the same is true of insect PKS enzymes, it may explain why a mixture of simple volatile alcohols and ketones of different chain length are frequently found together. For example, the mandibular glands of the ant Myrmica scabrinodis contain 3-hexanol, 3-heptanol, 3-octanol, 6-methyl-3-octanol, 3-nonanol, 3-decanol and 3-undecanol and all their corresponding ketones. 

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