Beeton, Lesley Dawn2016-07-152016-07-152016-07-15http://hdl.handle.net/10539/20620A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of requirements for the degree of Master of Science. Johannesburg, 17 May 1994.Two black South African subjects presenting with hereditary elliptocytosis were investigated and the defect defined as Spol/74, a previously described spectrin variant leading to defective heterodimer self-association and instability of the erythrocyte membrane. [Abbreviated Abstract. Open document to view full version]enGenetic disorders.Genetic polymorphisms.Mutation (Biology)Hematology.Thesis