Some properties ofBufo bufo tyrosinase during development

Tyrosinase and L-DOPA decarboxylase activities have been investigated during Bufo bufo development since catecholamines and melanin are formed from common substrates in homologous cells. Catecholamines first appear at stage 13 (neural plate), but tyrosinase, at a very low level, and L-DOPA decarboxylase are present throughout all of prior development. Hence, L-DOPA decarboxylase activity is not likely to be correlated with the control of catecholamine synthesis, although at stage 17 it is mainly localized in the nonneural part of the embryo. The distribution of young melanosomes and L-DOPA decarboxylase suggest a separation between melanogenesis and catecholamine synthesis.

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A study on melanogenesis and catecholamine biosynthesis during Bufo bufo development

Miranda

Botti

Ragnelli

et al. 1982

J. Exp. Zool.

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Melanosome proteins duringBufo bufo development

Botti

Bonfigli

Arcadi

et al. 1985

Wilhelm Roux' Archiv

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5,6-Dihydroxyindole oxidation by mammalian, mushroom and amphibian tyrosinase preparations

Miranda

Botti

Bonfigli

et al. 1985

Biochimica et Biophysica Acta (BBA) - General Subjects

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Some properties ofBufo bufo tyrosinase during development

Abstract: Tyrosinase expression during Bufo bufo development has been investigated. Until stage 19, only 1 electrophoretic band is detectable, but at a later stage (25) 3 bands appear. The Km for L-3,4-dihydroxyphenylalanine (L-dopa) was also determined.

Cited by 4 publications

References 9 publications

A study on melanogenesis and catecholamine biosynthesis during Bufo bufo development

A study on melanogenesis and catecholamine biosynthesis during Bufo bufo development

Melanosome proteins duringBufo bufo development

5,6-Dihydroxyindole oxidation by mammalian, mushroom and amphibian tyrosinase preparations

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