Assay for mercurial preservatives in biological products by cold-vapor atomic absorption spectrophotometry.
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Biomedical subjects
Publications and source records attributed to A J Mustafa.
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Human factor X was purified by several different procedures yielding products which had varying amounts of factor VII and factor IX. Treatment with CHCl3 during the fractionation of the factor X removed 95% of the factor VII and factor IX activity and the resulting factor X activated more slowly when incubated in 25% sodium citrate. Removal of residual factor VII by DEAE cellulose chromatography yielded a factor X which activated still more slowly and less completely. When the factor VII, removed by chromatography, was added to the chromatographed factor X, the ability to be activated in 25% sodium citrate was restored. Confirmatory evidence for the role of factor VII in this reaction was the inhibition of the conversion of the factor X by both DFP and SBTI.
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