formic acid/sarcoma

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Identification of a precursor in the biosynthesis of the p21 transforming protein of harvey murine sarcoma virus.

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The p21 transforming protein coded for by the v-ras gene of Harvey murine sarcoma virus (Ha-MuSV) migrates as a doublet band between 21,000 and 23,000 daltons during sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The lower band of the doublet is designated p21, and the upper band is

Small fragments from the A subunit of cholera toxin capable of activating adenylate cyclase.

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Exposure of cholera toxin to membrane particles prepared from sarcoma 180 cells gives rise to a variety of fragments which are capable of activating adenylate cyclase [ATP:pyrophosphate-lyase (cyclizing), EC 4.6.1.1]. A major component of these fragments has an apparent molecular weight in the

Immunohistochemical identification of canine melanocytic neoplasms with antibodies to melanocytic antigen PNL2 and tyrosinase: comparison with Melan A.

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The immunoreactivity of PNL2 and antityrosinase in formalin-fixed, paraffin-embedded canine melanocytic neoplasms (n = 101) was compared with that of Melan A. Of the 113 samples overall, 106 were positive for PNL2, 101 for Melan A, and 90 for tyrosinase. Six melanomas that were positive for PNL2

Antitumor activity of degraded products of lentinan: its correlation with molecular weight.

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Lentinan, an antitumor polysaccharide from Lentinus edodes, was degraded to seven fractions by treatment with formic acid. The low molecular-weight fractions (I and II) showed no antitumor activity against sarcoma-180 solid-type tumor and the absorption maximum of Congo Red did not shift in their

Novel method for fast trabectedin quantification using hydrophilic interaction liquid chromatography and tandem mass spectrometry for human pharmacokinetic studies.

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Few time-consuming bioanalytical methods are currently available for trabectedin quantification in clinical investigations. Here we present a novel, fast and sensitive method for trabectedin determination in human plasma based on hydrophilic interaction liquid chromatography and tandem mass

Purine base composition analysis of normal and tumor rat DNA.

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Chemical and viral induced rat tumors were analyzed for their purine base composition and compared to normal tissue DNA'S. The tumors were induced by 7,12-dimethylbenz[a]anthracene (DMBA), 20-methylcholanthrene (MC), 3,4-benzopyrene (BP), 1,2-dimethylhydrazine (DMH) and Rous sarcoma virus (RSV).

Dependence on chain length of antitumor activity of (1 leads to 3)-beta-D-glucan from Alcaligenes faecalis var. myxogenes, IFO 13140, and its acid-degraded products.

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The well-defined (1 leads to 3)-beta-D-glucan with (DPn) 540, produced by cultivation of Alcaligenes faecalis var. Myxogenes (IFO 13140), a mutant of a soil bacterium, had marked inhibitory activity against the s.c.-implanted Sarcoma 180 at 5 to 50 mg/kg for 10 days. It also exhibited very high

Osteocalcin and Osteonectin Expression in Canine Osteosarcoma.

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Osteosarcoma (OSA) is a malignant heterogeneous primary bone tumor responsible for up to 90% of all primary bone tumors in dogs. In this study, osteocalcin (OC) and osteonectin (ON) immunoreactivity was evaluated in 23 canine OSAs, 4 chondrosarcomas, 4 fibrosarcomas, 2 hemangiosarcomas, and 4

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