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Control of the Human B-Globin Gene

  ©1998 by Alberts, Bray, Johnson, Lewis, Raff, Roberts, Walter.   http://www.garlandscience.com/ECB/about.html  
  Published by Garland Publishing, a member of the Taylor & Francis Group.


The diagram shows some of the gene regulatory proteins thought to control expression of this gene during red blood cell development. Some of the gene regulatory proteins shown, such as CP1, are found in many types of cells, while others, such as GATA-1, are present in only a few types of cells, including red blood cell precursors, and are therefore thought to contribute to the cell-type specificity of beta-globin gene expression. As indicated by the bidirectional arrows, several of the binding sites for GATA-1 overlap those of other gene regulatory proteins; it is thought that occupancy of these sites by GATA-1 excludes binding of other proteins. (Adapted from B. Emerson, In Gene Expression: General and Cell-Type Specific (M. Karin, ed.), pp. 116-161. Boston: Birkhauser, 1993.)

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