| sAPPα

Secreted amyloid precursor protein alpha (sAPPα) is an extracellular protein released following cleavage of the transmembrane amyloid precursor protein (APP) by the secretory protease α-secretase. As a metabolic product of the parent amyloid precursor protein (APP), it has been demonstrated to enhance hippocampal long-term potentiation (LTP) and memory formation in both normal animals and Alzheimer's disease models.
 

| 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)	10	5	2.5	1.25	0.62	0.31	0.15	0
OD	2.48	1.65	1.07	0.71	0.45	0.28	0.19	0.09
Corrected OD	2.39	1.56	0.98	0.62	0.36	0.19	0.1	-

 

| Repeatability

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

| Recovery

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

 

Sample Type	Range(%)	Average Recovery(%)
Serum(n=8)	84-101	96
Plasma(n=8)	92-105	102
Cell Culture Supernates(n=8)	96-108	105

 

| Linearity

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

 

		Serum(n=4)	Plasma(n=4)	Cell Culture Supernates(n=4)
1 : 2	Range (%)	84-95	88-96	90-110
	Average (%)	91	93	96
1 : 4	Range (%)	89-103	87-108	105-115
	Average (%)	94	97	108