Application

This kit can be used for detection of Na+K+-ATPase activity in animal tissue, culture cells and other samples. 

Detection principle

ATPase can decompose ATP and produce ADP and inorganic phosphorus. ATPase activity can be calculated indirectly by measuring the content of inorganic phosphorus.

Detection significance

ATPase exists on the membrane of tissue cells and organelles. It is a kind of protease on the biological membrane which plays an important role in material transport, energy conversion and information transmission. The enzyme activity of ATPase will have a series of changes when the body in the hypoxic or diseases condition, and is also associated with some genetic diseases.

Experimental instruments

Test tube, Micropipettor, Vortex mixer, 37℃ water bath/gas bath, Spectrophotometer (636 nm)

Sample preparation

1. Tissue sample

Weigh the tissue accurately, add 9 times of normal saline at the ratio of Weight (g): Volume (mL) = 1:9. Make the mechanical homogenization in ice water bath to prepare 10% homogenate. Centrifuge at 2500 rpm for 10 min and take the supernatant (10% homogenate). Then dilute the 10% homogenate with normal saline for 10 times to prepare 1% homogenate for detection. Meanwhile, determine the protein concentration of supernatant (E-BC-K318, E-BC-K168, E-BC-K165). If the result of pre-experiment is too high, dilute the 1% tissue homogenate to different concentrations for pre-experiment and determine the sample concentration according to the result.

2. Cells sample

Collect and centrifuge the culture cells, discard the supernatant and keep the cell sediment. Add 0.2~0.3 mL of normal saline to prepare 107/mL cell suspension, then broken the cells by homogenizer, ultrasonic crusher or freezing/thawing cycles. The prepared cell suspension does not need to be centrifuged. Meanwhile, determine the protein concentration of supernatant (E-BC-K318, E-BC-K168, E-BC-K165).Then dilute the cell homogenate to different concentrations for pre-experiment and determine the sample concentration according to the result.

[Note] 1. The sample must be mix fully when test the sample.

2. Do not use phosphate buffer or phosphorus-containing reagents as homogenization media or dilute samples.

3. The absolute OD value (the OD value of sample- the OD value of control) in pre-experiment should be control about 0.2.

4. The enzyme activity will be affect when treat the cells by freezing/thawing cycles.

Operation steps

1. Enzymatic reaction

2. Determine phosphorus

Notes

1. The kit is for scientific research only.

2. Instructions should be followed strictly, changes of operation may result in unreliable results.

3. The validity of kit is 6 months.

4. Do not use components from different batches of kit.

5.       It is should pay attention to avoid the contamination of phosphorus.