Results 211 to 220 of about 53,271 (260)
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Phloretin as both a substrate and inhibitor of tyrosinase: Inhibitory activity and mechanism.
Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, 2020Tyrosinase is the rate-limiting enzyme for controlling the production of melanin in the human body, and overproduction of melanin can lead to a variety of skin disorders. In this paper, the inhibitory kinetics of phloretin on tyrosinase and their binding
Jianmin Chen +5 more
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Mushroom Tyrosinase: Recent Prospects
Journal of Agricultural and Food Chemistry, 2003Tyrosinase, also known as polyphenol oxidase, is a copper-containing enzyme, which is widely distributed in microorganisms, animals, and plants. Nowadays mushroom tyrosinase has become popular because it is readily available and useful in a number of applications.
Sung-Yum, Seo +2 more
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Biomedical applications of tyrosinases and tyrosinase inhibitors
Tyrosinase is involved in several human diseases, among which hypopigmentation and depigmentation conditions (vitiligo, idiopathic guttate hypomelanosis, pityriasis versicolor, pityriasis alba) and hyperpigmentations (melasma, lentigines, post-inflammatory and periorbital hyperpigmentation, cervical idiopathic poikiloderma and acanthosis nigricans ...Luigi, Pisano +2 more
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Reversible oxygenation of tyrosinase
Biochemical and Biophysical Research Communications, 1972Summary When mushroom tyrosinase reacts aerobically with molar equivalents of H2O2, a hitherto unobserved absorption spectrum develops, apparently according to first order kinetics, and then decays. The spectrum has peaks, ɛ345 nm = 10 × 103 MCu−1 cm−1 and ɛ600 nm = 7 × 102 MCu−1 cm−1.
R L, Jolley, L H, Evans, H S, Mason
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International Journal of Biological Macromolecules, 2020
In this study, the inhibitory effects of four anthraquinones including chrysophanol, emodin, physcione and rhein on tyrosinase were investigated by enzyme inhibition assay.
Hua‐jin Zeng +5 more
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In this study, the inhibitory effects of four anthraquinones including chrysophanol, emodin, physcione and rhein on tyrosinase were investigated by enzyme inhibition assay.
Hua‐jin Zeng +5 more
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Experientia, 1968
L'activite de tyrosinase integumentale est augmente par un sejour de 10–18 jours a 0–4°C sous oxygene ou en plein air mais pas nitrogene. Les 3 especes vertebres qui montrent cette reaction sontMyxine glutinosa, Lepisosteus osseus etNeoceratodus fosteri.
Y M, Chen, W, Chavin
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L'activite de tyrosinase integumentale est augmente par un sejour de 10–18 jours a 0–4°C sous oxygene ou en plein air mais pas nitrogene. Les 3 especes vertebres qui montrent cette reaction sontMyxine glutinosa, Lepisosteus osseus etNeoceratodus fosteri.
Y M, Chen, W, Chavin
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ATYPICAL TYROSINASE POSITIVE ALBINOS
The Journal of Dermatology, 1981ABSTRACTUsing light and electron microscopy, we studied five cases of tyrosinase positive albinism, with special reference to melanization of the hair‐bulbs before and after incubation with L‐tyrosine. Electron microscopic autoradiographs of the hair‐bulbs after incubation with 3H‐L‐tyrosine were also investigated.
M, Mizoguchi +5 more
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British Journal of Dermatology, 1981
Purification of tyrosinase inhibitors of hamster melanomas was carried out using tyrosinase binding affinity column chromatography. This method enables the isolation of tyrosinase inhibitors with a 124-fold purification index as compared to that of crude preparation after dialysation.
G, Imokawa, Y, Mishima
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Purification of tyrosinase inhibitors of hamster melanomas was carried out using tyrosinase binding affinity column chromatography. This method enables the isolation of tyrosinase inhibitors with a 124-fold purification index as compared to that of crude preparation after dialysation.
G, Imokawa, Y, Mishima
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Tyrosinase inhibitors as potential antibacterial agents.
European journal of medicinal chemistry, 2019Tyrosinase is a copper-containing enzyme that catalyzes the biosynthesis of melanin. This enzyme is present in bacteria, fungi, plants and animals, and plays multiple roles in pigmentation, wound healing, radiation protection, primary immune responses ...
Ye Yuan +7 more
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Activation of epidermal tyrosinase
Biochemical and Biophysical Research Communications, 1970Abstract A soluble fraction obtained from the epidermis of Rana pipiens contains tyrosinase which either is competitively inhibited or is present as protyrosinase. Exposure of the epidermal preparation to trypsin or chymotrypsin activates the tyrosinase. There is no demonstrable activity before exposure to trypsin; after activation, dorsal (pigmented)
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