oxalis compacta/tyrosine

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Molecular analysis of type I-A (tyrosinase negative) oculocutaneous albinism.

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Type I oculocutaneous albinism (OCA) is caused by the reduction in or absence of activity of tyrosinase in melanocytes in skin, hair, and the eyes, the result of mutations of the tyrosinase gene. To date, a total of 22 unique mutations in the coding region of tyrosinase have been described in the

Diagnostic and prognostic cytogenetics of chronic myeloid leukaemia: an update.

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Despite the advent of molecular assessment, banding cytogenetics and fluorescence in situ hybridization (FISH) still have a significant role in diagnostic and prognostic approaches to chronic myeloid leukaemia (CML). Area covered: At diagnosis and during treatment with tyrosine kinase inhibitors

Mutations of the human tyrosinase gene associated with tyrosinase related oculocutaneous albinism (OCA1). Mutations in brief no. 204. Online.

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Mutations in the human tyrosinase gene produce tyrosinase-related oculocutaneous albinism (OCA1, MIM #203100). Tyrosinase is a copper containing enzyme and is responsible for catalyzing the rate limiting step in melanin biosynthesis, the hydroxylation of tyrosine to dopaquinone. We report 13 new

Nontranscriptional regulation of SYK by the coactivator OCA-B is required at multiple stages of B cell development.

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OCA-B was originally identified as a nuclear transcriptional coactivator that is essential for antigen-driven immune responses. The later identification of a membrane bound, myristoylated form of OCA-B suggested additional, unique functions in B cell signaling pathways. This study has shown that

The molecular genetics of albinism and piebaldism.

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BACKGROUND Oculocutaneous albinism (OCA) is an autosomal-recessive genetic disorder defined by hypomelanosis in the eyes, hair, and skin. Piebaldism is an autosomal-dominant congenital leukoderma associated with a white forelock. The molecular pathogeneses of these congenital pigmentary disorders

Distinguishing between the catalytic potential and apparent expression of tyrosinase activities.

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Assays were developed to investigate the catalytic potential and apparent expression of tyrosinase activities. Tyrosine hydroxylase activity determined with cell lysates (in vitro), entire fixed cells (postfixation), or intact living cells (in situ), and 3,4-dihydroxyphenylalanine oxidase assayed

Molecular basis of type IA (tyrosinase negative) oculocutaneous albinism.

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Type IA (Tyrosinase negative) oculocutaneous albinism (OCA) is produced by mutations of the tyrosinase gene. We have found a total of 13 different mutations associated with type IA OCA. Analysis of the distribution of the 9 missense mutations shows that most of these mutations cluster in three areas

Mutation in and lack of expression of tyrosinase-related protein-1 (TRP-1) in melanocytes from an individual with brown oculocutaneous albinism: a new subtype of albinism classified as "OCA3".

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Most types of human oculocutaneous albinism (OCA) result from mutations in the gene for tyrosinase (OCA1) or the P protein (OCA2), although other types of OCA have been described but have not been mapped to specific loci. Melanocytes were cultured from an African-American with OCA, who exhibited the

Interaction of the B cell-specific transcriptional coactivator OCA-B and galectin-1 and a possible role in regulating BCR-mediated B cell proliferation.

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OCA-B is a B cell-specific transcriptional coactivator for OCT factors during the activation of immunoglobulin genes. In addition, OCA-B is crucial for B cell activation and germinal center formation. However, the molecular mechanisms for OCA-B function in these processes are not clear. Our previous

Anti-Cancer Potential of Oxialis obtriangulata in Pancreatic Cancer Cell through Regulation of the ERK/Src/STAT3-Mediated Pathway

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As a plant medicine, Oxalidaceae has been used to treat various diseases in Korea. However, there is little data on the anti-cancer efficacy of Oxalidaceae, particularly O. obtriangulata. This study aimed to investigate the anti-cancer effect of O. obtriangulata methanol

p66Shc longevity protein regulates the proliferation of human ovarian cancer cells.

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p66Shc functions as a longevity protein in murine and exhibits oxidase activity in regulating diverse biological activities. In this study, we investigated the role of p66Shc protein in regulating ovarian cancer (OCa) cell proliferation. Among three cell lines examined, the slowest growing OVCAR-3

Mutational mapping of the catalytic activities of human tyrosinase.

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Tyrosinase (EC 1.14.18.1) is a copper-containing metalloglycoprotein that catalyzes several steps in the melanin pigment biosynthetic pathway; the hydroxylation of tyrosine to L-3,4-dihydroxyphenylalanine (dopa) and the subsequent oxidation of dopa to dopaquinone. It has been proposed that

Minimal Efficacy of Nitisinone Treatment in a Novel Mouse Model of Oculocutaneous Albinism, Type 3.

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UNASSIGNED Oral nitisinone has been shown to increase fur and ocular pigmentation in a mouse model of oculocutaneous albinism (OCA) due to hypomorphic mutations in tyrosinase (TYR), OCA1B. This study determines if nitisinone can improve ocular and/or fur pigmentation in a mouse model of OCA type 3

A C-terminal acidic domain regulates degradation of the transcriptional coactivator Bob1.

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Bob1 (Obf-1 or OCA-B) is a 34-kDa transcriptional coactivator encoded by the Pou2af1 gene that is essential for normal B-cell development and immune responses in mice. During lymphocyte activation, Bob1 protein levels dramatically increase independently of mRNA levels, suggesting that the stability

Inverse relationship between epidermal growth factor receptor expression and radiocurability of murine carcinomas.

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The study investigated whether a relationship exists between the extent of epidermal growth factor receptor (EGFR) expression and in vivo radiocurability of murine tumors. EGFR expression was determined in nine carcinomas (four mammary carcinomas, designated MCa-4, MCa-29, MCa-35, and MCa-K; two

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