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3.1 Introduction

We are now ready to describe in detail the major intracellular signalling pathways responsible for relaying the signal from the surface receptor to evoke a cellular response. This section will deal with signalling molecules that operate at the cytosolic leaflet of the plasma membrane (trimeric G proteins, monomeric G proteins and lipid-modifying enzymes), second messengers (such as Ca2+, cAMP, cGMP), protein kinases and phosphatases, and finally transcription factors.


Author(s): The Open University

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Operations on Radical Expressions - Yay Math
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Author(s): up-close@unimelb.edu.au (University of Melbourne)

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10.2 Media coverage of cloning and genetic medical research

Hargreaves, I., Lewis, J. and Speers, T. ‘Towards a better map: Science, the public and the media’, Economic and Social Research Council.

Kitzinger and Reilly, writing about the coverage of genetic research, identified the dichotomous nature of media coverage on this issue. Human medical genetic research is either framed in terms of'the ‘great promise’ discourse focusing on the benefits the science can bring’ or else, the ‘concern’ discourse, focusing on the risks a
Author(s): The Open University

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1.3.1 Try some yourself

1 Write each of the following three numbers in numerals and then place them in ascending order:

  • eight hundred and eight thousand

  • two million and twenty-four

  • nine thous
    Author(s): The Open University

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