Abstract:
:The inactivation of human factor X by incubation with a reagent known to chemically modify gamma-carboxyglutamic acid to gamma-methylene glutamic acid was studied. Incubation of factor X at pH 5.0 with a preincubated formaldehyde/morpholine mixture (0.9 M/1.0 M) resulted in a progressive decrease in factor X coagulant activity. In the presence of calcium (20 mM) the rate of factor X inactivation was decreased -3-fold. By using [14]C-formaldehyde, modified-factor X (less than 5% residual activity) was found to contain 7 mols of [14]C per mol of protein. Modified-factor X was not activated by Russell's viper venom in the presence of calcium, suggesting that the loss of coagulant activity was related to the inability of modified-factor X to be activated.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Sherrill GB,Straight DL,Hiskey RG,Roberts HR,Griffith MJdoi
10.1016/0006-291x(84)90945-8subject
Has Abstractpub_date
1984-10-15 00:00:00pages
256-61issue
1eissn
0006-291Xissn
1090-2104pii
0006-291X(84)90945-8journal_volume
124pub_type
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