Reasons for differing haemoglobin variant percentages in carriers
  	Posted by: 
	Shirley Henderson, Posted on: 
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  Categories: 
  NHS Sickle Cell and Thalassaemia Screening Programme
    
  ...normal beta chains. Other beta globin variants, such as J –Baltimore, are negatively charged andcompete well for the alpha chains and therefore have higher percentages. Another property of a variant...