Effect of pressure and ionic strength on the self-association of Apo-A-I from the human high density lipoprotein complex. |
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Authors: | S Formisano H B Brewer J C Osborne |
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Abstract: | The self-association of apo-A-I isolated from the human high density lipoprotein complex has been investigated by gel permeation chromatography and sedimentation equilibrium. The apparent weight average molecular weight (MWapp) versus Apo-A-I concentration profile was found to be sensitive to ionic strength and pressure; MWapp increased with increasing ionic strength and decreasing rotor speed. The data were consistent with a monomer-dimer-tetrameroctamer association shceme over all conditions investigated if a change in the partial specific volume of apo-A-I upon association of 5.5 x 10(-2) ml/g is postulated. |
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