| GR-β

Glucocorticoid receptor beta (GR-β) is a class of isoforms of the glucocorticoid receptor, the other being GRα. Both are the result of the same transcription product of the glucocorticoid receptor gene being sheared by different shearing modes. The latter binds to DNA but not to steroids, and may therefore act as an inhibitor of steroids by interfering with the binding of GRα to DNA.The first 727 amino acids of GRα and GRβ are identical, and from amino acid 728 onwards there is a 50-amino acid sequence for GRα, whereas there is only a 15-amino acid sequence for GRβ. At the mRNA level, both contain exons 1 through 8, differing in that GRα contains exon 9α while GRβ contains exon 9β.
 

| 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	0.62	0.31	0
OD	2.51	1.96	1.24	0.72	0.46	0.3	0.22	0.09
Corrected OD	2.42	1.87	1.15	0.63	0.37	0.21	0.13	-

 

| Repeatability

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

| Recovery

The recovery of Human GR-β 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)	92-104	101
Cell Culture Supernates(n=8)	96-108	105

 

| Linearity

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

 

		Tissue Homogenates(n=4)	Cell Culture Supernates(n=4)
1 : 2	Range (%)	84-95	90-110
	Average (%)	91	96
1 : 4	Range (%)	88-103	105-115
	Average (%)	93	108