| FⅪ

Coagulation Factor XI (FⅪ) , or plasma prothrombin, is the prozyme form of factor XIa, one of the enzymes involved in blood clotting. Like many other clotting factors, it is a serine protease, encoded by the F11 gene. Factor XI (FXI) is produced by the liver and circulates as a homo-dimer in its inactive form. The plasma half-life of FXI is approximately 52 hours. The zymogen factor is activated into factor XIa by factor XIIa (FXIIa), thrombin, and FXIa itself.
 

| Typical data

As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique, wash technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data are provided below for reference only.

 

Concentration (ng/mL)	40	20	10	5	2.5	1.25	0.62	0
OD	2.2	1.65	1.16	0.8	0.54	0.37	0.28	0.09
Corrected OD	2.11	1.56	1.07	0.71	0.45	0.28	0.19	-

 

| Repeatability

Intra-assay Precision (Precision within an assay)：CV% < 10%; Inter-assay Precision (Precision between assays)：CV% < 10%
 

| Recovery

The recovery of Human FⅪ spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

 

Sample Type	Range(%)	Average Recovery(%)
Plasma(n=8)	92-105	102

 

| Linearity

Samples were spiked with high concentrations of Human FⅪ and diluted with Universal Diluent to produce samples with values within the range of the assay.

 

		Plasma(n=4)
1 : 2	Range (%)	88-97
	Average (%)	93
1 : 4	Range (%)	87-107
	Average (%)	98