Melanin biosynthesis involves the enzymatic conversion of tyrosine, via
dihydroxyphenylalanine (dopa), to melanin through a number of intermediate steps. It is …

Melanin (eumelanin) is commonly produced in mammals starting from tyrosine and/or 3, 4‐
dioxyphenylalanine (DOPA) under the action of tyrosinase. 3‐Hydroxyanthranilic acid and 3 …

Human malignant melanocytes show characteristic morphologic modifications which are
particularly evident in their specific organelles: melanosomes. These modifications are …

Studies in vitro. From the finding that vitamin C [ascorbic acid] inhibits the reaction by which
dopa chrome is formed from dopa (dihydroxyphenylalanine) it is suggested that the gingival …

5-S-cysteinyldopa concentrations were determined by high-pressure liquid chromatography
and electrochemical detection in plasma from normally pigmented patients and patients with …

According to recent theory on the structure of melanin, the sulfur content of melanin is a
reflection of the amount of cysteine used in its manufacture. We compared the sulfur …

Urinary excretion of 5-S-cysteinyldopa was investigated in 20 healthy Japanese (10 men
and 10 women). The values of excretion varied between 46 and 193 microgram/24 h. The …

Autochthonous Formation of Melanin in Mesodermal Cells Page 1 Paper Dermatologica.
1951;103:144-157 Autochthonous Formation of Melanin in Mesodermal Cells E. Meirowsky LW …

There is now much evidence suggesting that there are multiple control points in the process
of melanin production. The most fundamental process of melanogenesis is centered on the …

M elanoma ti% ue from four out of se ven studied Ugandan African patients contained 5-S-
cysteinyldopa. The tumours with 5-S-cysteinyldopa also contained free dopa but in smaller …