997 resultados para Kipke, Harry G.


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Las disputas en torno a determinados aspectos del dinero, como su neutralidad y el carácter endógeno o exógeno de la oferta monetaria, han sido permanentes entre las distintas escuelas de pensamiento y autores, estando su origen, probablemente, en la época de desarrollo del pensamiento escolástico. En este artículo pretendemos, en primer lugar, realizar un recorrido cronológico e histórico sobre el tratamiento científico económico del dinero, para, en segundo lugar, poner sobre la mesa la macroeconomía ortodoxa a la que han dado lugar las interpretaciones al respecto, así como los enfoques alternativos frente a este pensamiento dominante. Finalmente, intentamos poner en valor los desarrollos monetarios post-keynesianos, integrados en lo que denominan “Economía Monetaria de Producción”, confrontándolos con la llamada Nueva Síntesis Neoclásica.

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Resumen tomado del autor. Resumen en castellano e ingl??s. Notas a pie de p??gina. Este art??culo se incluye en el monogr??fico 'Did??cticas espec??ficas'

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Receptors activate adenylyl cyclases through the Gs subunit. Previous studies from our laboratory have shown in certain cell types that express adenylyl cyclase 6 (AC6), heterologous desensitization included reduction of the capability of adenylyl cyclases to be stimulated by Gs. Here we further analyze protein kinase A (PKA) effects on adenylyl cyclases. PKA treatment of recombinant AC6 in insect cell membranes results in a selective loss of stimulation by high (>10 nM) concentrations of Gs. Similar treatment of AC1 or AC2 did not affect Gs stimulation. Conversion of Ser-674 in AC6 to an Ala blocks PKA phosphorylation and PKA-mediated loss of Gs stimulation. A peptide encoding the region 660–682 of AC6 blocks stimulation of AC6 and AC2 by high concentrations of Gs. Substitution of Ser-674 to Asp in the peptide renders the peptide ineffective, indicating that the region 660–682 of AC6 is involved in regulation of signal transfer from Gs. This region contains a conserved motif present in most adenylyl cyclases; however, the PKA phosphorylation site is unique to members of the AC6 family. These observations suggest a mechanism of how isoform selective regulatory diversity can be obtained within conserved regions involved in signal communication.

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Jickling, Lyman & Powell, architects. Built 1980. On verso: Photographer's stamp; 5968-1

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Jickling, Lyman & Powell, architects. Built 1980. On verso: Photographer's stamp; 5968-5

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Added t. p. illustrated in color.