Product description

UltraNuclease, also known as non-restrictive endonuclease, broad-spectrum nuclease, is a non-specific endonuclease derived from Serratia Marcescen, which hydrolyzes internal phosphodiester bonds between any nucleotides in nucleic acids to produce 5'-monophosphate oligonucleotides of 2-5 bases in length. It can degrade DNA and RNA in various forms (double-stranded, single-stranded, linear, circular, native or denatured) under a very broad range of conditions (6 M Urea, 0.1 M Guanidine HCl, 0.4% Triton X-100, 0.1% SDS, 1 mM EDTA, 1 mM PMSF) and is widely used to remove nucleic acids from biological products. UltraNuclease can also be removed by corresponding methods subsequently.

This kit uses the principle of double-antibody sandwich enzyme-linked immunosorbent assay (sandwich ELISA) to detect the residues of denatured and non-denatured UltraNuclease. First, coat the microplate with anti-UltraNuclease rabbit polyclonal antibody to form a solid-phase antibody. Second, add UltraNuclease standard and test sample to the solid-phase antibody microplate, then add biotin labeled Anti-UltraNuclease polyclonal antibody, and finally add horseradish peroxidase-labeled streptavidin (SA-HRP) to form an antibody + antigen + antibody-Biotin + SA-HRP complex. Subsequently, add TMB substrate into the complex to observe color reaction after washing the complex. TMB is converted into blue under the catalysis of HRP enzyme and finally converted into yellow in the presence of acid, and the shade of color is positively correlated with the amount of UltraNuclease in the sample.

The detection range of this kit is 0.047-3 ng/mL; the lower detection limit is 23.5 pg/mL.

Feature

• Highly sensitive: Detecting as little as 23 pg/mL of UltraNuclease residuals in in-process and final biological samples.
• Ensures accuracy: The UltraNuclease residuals can be accurately detected with a recovery of 80%-110%.
• Specificity: Cooperate use with YEASEN UltraNuclease and can accurately detect the residuals.
• Stable: The difference between lot-to-lot is low, the kit property is not impacted under 37℃ for 6 days.
• Easy signal collection: Using Biotin-Streptavidin system, the signal can be stably enlarged.

Application

• Residual UltraNuclease test in biological products

Specification

Sensitivity	23 pg/mL (range 0.047~3 ng/mL)
Assay Time	<4 hours
Assay Principle	Two-site immunoenzymetric assay
Signal Amplification	Biotin-Streptavidin system
Detection Wavelength	450nm

Components

Components No.	Name	36718ES59
36718-A	ELISA Microplates	1 Plate
36718-B	Detection Antibody：Biotin-conjugated Rabbit Anti-UltraNuclease Antibodies	35 μL (0.2 mg/mL)
36718-C	Standard:  UltraNuclease	1 vial (500 ng/mL)
36718-D	HRP-conjugated Streptavidin	10 μL
36718-E	Dilution Buffer 1	45 mL
36718-F	20×Wash Buffer	50 mL
36718-G	Dilution Buffer 2	30 mL
36718-H	TMB	15 mL
36718-I	Sealing Film	5 pieces

* The stop solution is not provided in this kit, it need to be prepared by user. 1M HCl can be used as the stop solution.

Storage

This product should be stored at 2°C ~8°C. Unopened product is valid for one year. Once the reagent is opened, it is valid for half a year. Never freeze this product.

*1. The diluted washing buffer and dilution buffer can be stored at 2°C ~8°C for 1 week.

*2. Standard 36701-C is liquid and stored at 2°C ~8°C for 1 year.

*3. Prepared detection antibody and stop buffer can be stored at 2°C ~8°C for 1 month.

Figures

• Specificity Demonstration

Figures 1. The specificity of UltraNuclease ELISA kit was shown in the figure above

8 mimic samples were estimated for the non-specific reaction with the antibodies in the kit. There was no significant difference between the 8 samples and the negative sample. （*: Significant difference from Negative sample）

• Precision Display

A）Repeatability

Concentration (ng/mL)	6 duplicated data in the same plate						CV
3	2.412	2.390	2.323	2.367	2.476	2.291	2.53%
1.5	1.780	1.883	1.884	1.908	1.876	1.883	2.19%
0.75	1.123	1.215	1.166	1.18	1.140	1.109	3.12%
0.375	0.691	0.706	0.708	0.722	0.722	0.679	2.21%
0.1875	0.449	0.462	0.453	0.460	0.447	0.433	2.13%
0.094	0.306	0.308	0.304	0.311	0.295	0.302	1.65%
0.047	0.242	0.241	0.240	0.241	0.256	0.240	2.37%
0	0.183	0.192	0.189	0.187	0.189	0.189	1.43%

B）Intermediate precision

Intermediate Precision
Conc.	1.5 ng/mL	0.375 ng/mL	0.094 ng/mL
Analyst 1	1.388	0.382	0.079
Analyst 2	1.458	0.363	0.068
Analyst 3	1.318	0.370	0.063
Average	1.388	0.372	0.070
SD	0.070	0.010	0.008
CV	5.04%	2.59%	11.69%

Figures 2. The precision of UCF.ME™ UltraNuclease ELISA was assayed as the above scheme

6 duplicated were tested at each concentration on the standard curve, and all the CV% were lower than 5% (Figure 2A). 3 analysts conduct the UCF.ME™ UltraNuclease ELISA experiment and the CV% were lower than 15% (Figure 2B).

• Accuracy Validation

A）

B)

Concentration	OD450				Result
ng/mL	Repeat 1	Repeat 2	Repeat 3	Average	Conc.	Recovery%
3	2.271	2.222	2.287	2.260	2.950	98%
1.5	1.495	1.488	1.514	1.499	1.540	103%
0.750	0.868	0.856	0.890	0.871	0.735	98%
0.375	0.537	0.525	0.522	0.528	0.358	95%
0.188	0.373	0.369	0.389	0.377	0.201	107%
0.093	0.261	0.255	0.258	0.258	0.082	88%
0	0.184	0.195	0.187	0.189	0	0

Figures 3. The accuracy of UCF.ME™ UltraNuclease ELISA was assayed as the following scheme

UltraNuclease was spiked in 5 μg/mL cell lysis solutions (HEK293, E.coli, CHO, and Vero) independently with a final spiked conc. of 1.5 ng/mL. The accuracy in different cell samples showed excellent than other vendor（Figure 3A). UltraNuclease was spiked in an actual sample (provided by the client) and is serial 2 folds diluted from 3ng/mL to 0.093ng/mL. The spike recovery was all between 80%~110% (Figure 3B).