Pheomelanogenesis is a complex pathway that starts with the oxidation of tyrosine (or
DOPA, 3, 4‐dihydroxyphenylalanine) by tyrosinase in the presence of cysteine, which …

We previously reported a constant ratio of the benzothiazole pheomelanin marker thiazole‐
2, 4, 5‐tricarboxylic acid (TTCA) to the eumelanin marker pyrrole‐2, 3, 5‐tricarboxylic acid …

The characteristic absorption and photochemical properties of pheomelanins are generally
attributed to “benzothiazine” structural units derived biogenetically from 5‐S‐cysteinyldopa …

Following the discovery of cysteinyldopas as the early intermediates in the biogenesis of
pheomelanins, the typical red hair pigments, the reactivity of the biosynthetic precursors …

Alkaline H2O2 degradation of red hair pheomelanin gave, besides 6‐(2‐amino‐2‐
carboxyethyl)‐2‐carboxy‐4‐hydroxybenzothiazole (BTCA), a new product which was …

Biosynthetic and model in vitro studies have shown that pheomelanins, the distinctive
pigments of red human hair, arise by oxidative cyclization of cysteinyldopas mainly 5-S …

It has long been known that pheomelanins, the distinctive pigments of red hair and celtic
skin, arise by the oxidative cyclization of cysteinyldopas, mainly the 5-S-isomer 1, via 1, 4 …

Two types of melanin pigment are produced in mammals; the brown-to-black eumelanins
and the yellow-to-reddish-brown pheomelanins. The switch from one type of melanin to the …

The diversity of pigmentation in the skin, hair, and eyes of humans has been largely
attributed to the diversity of pH in melanosomes with an acidic pH being proposed to …

Pheomelanins, the typical epidermal pigments of red haired, Celtic-type Caucasians, arise
from oxidative cyclization of cysteinyldopas, mainly the 5-S-isomer CD, via 1, 4 …