Table 1.

Total and free protein S antigen levels, prothrombin levels, and APC-independent activity of protein S (pSR)

Population
Total protein S, %
Free protein S, %
Prothrombin, %
pSR
Control   93 ± 13   101 ± 18   99 ± 13   1.62 ± 0.16  
Protein S—deficient   61 ± 11*  47 ± 25*  95 ± 14   1.31 ± 0.09* 
Prothrombin G20210A
 		 99 ± 22
 		 91 ± 25**
 		 123 ± 24*
 		 1.47 ± 0.21*
 
Population
Total protein S, %
Free protein S, %
Prothrombin, %
pSR
Control   93 ± 13   101 ± 18   99 ± 13   1.62 ± 0.16  
Protein S—deficient   61 ± 11*  47 ± 25*  95 ± 14   1.31 ± 0.09* 
Prothrombin G20210A
 		 99 ± 22
 		 91 ± 25**
 		 123 ± 24*
 		 1.47 ± 0.21*
 

All antigen determinations were performed using normal pooled plasma as the standard and antigen levels were expressed as percentages (mean ± SD) of levels present in normal pooled plasma.

*

P < .001 compared with control population.

**

P < .05 compared with control population.

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