| NHE3

Sodium–hydrogen antiporter 3 also known as sodium–hydrogen exchanger 3 (NHE3) or solute carrier family 9 member 3 (SLC9A3) is a protein that is encoded by the SLC9A3 gene.SLC9A3 is a sodium–hydrogen antiporter. It is found on the apical side of the epithelial cells of the proximal tubule of the nephron of the kidney, in the apical membrane of enterocytes of the intestine, as well as the basolateral side of both duodenal and pancreatic cells responsible for the release of bicarbonate into the duodenal lumen. It is primarily responsible for maintaining the balance of sodium. It is also indirectly linked to buffering of blood pH.
 

| 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)	20	10	5	2.5	1.25	0.625	0.312	0
OD	2.24	1.55	0.98	0.52	0.32	0.21	0.17	0.08
Corrected OD	2.16	1.47	0.9	0.44	0.24	0.13	0.09	-

 

| Repeatability

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

| Recovery

The recovery of Rat NHE3 spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

 

Sample Type	Range(%)	Average Recovery(%)
Tissue Homogenates(n=8)	94-105	102
Cell Lysates(n=8)	96-108	104

 

| Linearity

Samples were spiked with high concentrations of Rat NHE3 and diluted with Universal Diluent to produce samples with values within the range of the assay.

 

		Tissue Homogenates(n=4)	Cell Lysates(n=4)
1 : 2	Range (%)	85-96	90-110
	Average (%)	92	98
1 : 4	Range (%)	87-108	105-115
	Average (%)	99	108