| UBD

Ubiquitin D is a protein that is encoded by the UBD gene, also known as FAT10. UBD acts like ubiquitin, by covalently modifying proteins and tagging them for destruction in the proteasome.UBD was first discovered in reticuloendothelial tissues and mucosal-associated lymphoid immunological systems as one of the genes at the major histocompatibility complex class I locus on chromosome 6. The UBD gene encodes an 18 kDa protein containing an N- and C-terminus with 29 and 36% identity with ubiquitin, respectively. Of the ubiquitin-like proteins that have been identified, UBD is the only one of that conjugate to target proteins by a free diglycine motif at the C-terminus and directly guides noncovalently bound proteins to proteasomal degradation.
 

| 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)	200	100	50	25	12.5	6.25	3.12	0
OD	2.36	1.79	1.28	0.86	0.63	0.38	0.26	0.08
Corrected OD	2.28	1.71	1.2	0.78	0.55	0.3	0.18	-

 

| Repeatability

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

| Recovery

The recovery of Human UBD 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

 

| Linearity

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

 

		Serum(n=4)	Plasma(n=4)
1 : 2	Range (%)	84-95	88-96
	Average (%)	91	93
1 : 4	Range (%)	89-103	87-108
	Average (%)	94	98