Protein purification fillers can accurately identify and adsorb target proteins based on the various mechanisms of action mentioned above, while having low affinity for most impurity proteins. This high selectivity enables effective separation of target proteins in complex protein mixtures, greatly improving purification efficiency and purity, and reducing the complexity of subsequent processing steps.

On the one hand, it can process a large number of samples in a relatively short period of time. Its rapid adsorption and desorption processes, as well as reasonable column design and operating procedures, enable protein purification to be carried out in a more efficient state, meeting the requirements of time and yield in scientific research and industrial production. It can maintain its structural and functional integrity even in a wide range of pH values, changes in ionic strength, and the presence of organic solvents, and will not fail due to slight changes in external environmental factors. This enables the reliable use of protein purification fillers under different purification conditions, ensuring the reproducibility and consistency of purification results.

Precautions for using protein purification fillers:

1. Buffer selection and processing

-Buffer composition: Choose a suitable buffer system, with parameters such as pH value and ionic strength that are suitable for the stability of the target protein and its binding with the filler. At the same time, appropriate additives such as protease inhibitors, metal chelating agents, reducing agents, etc. can be added as needed to protect protein activity and prevent protein degradation, oxidation, etc.

-Buffer filtration and degassing: All buffer solutions used should be filtered through a 0.22 μ m membrane to remove impurities and microorganisms. And before use, the buffer solution stored at low temperature should be restored to room temperature and subjected to degassing treatment to avoid the gas in the buffer solution affecting the separation effect during the chromatography process.

2. Operation process control

-Temperature control: During protein purification, it is advisable to operate at low temperatures, such as on ice or in cold storage, to prevent protein denaturation and degradation. Especially when dealing with temperature sensitive proteins, strict temperature control is necessary.

-Flow rate control: Control the flow rate of the chromatography column well to avoid insufficient binding or incomplete elution of protein and packing caused by too fast flow rate, and also to avoid slow flow rate affecting experimental efficiency. Different fillers and purification steps may have suitable flow rate ranges, which need to be adjusted according to the actual situation.

-Avoid contamination: The entire operation process should be kept sterile and clean. Disposable consumables such as suction tips, tubes, and bottles should be used, and reusable glassware should be strictly cleaned and disinfected to prevent bacteria, fungi, or other impurities from contaminating protein samples and fillers, which can affect purification efficiency.

3. Protection and maintenance of fillers

-Preventing cracking: During operation, it is important to avoid prolonged exposure of the packing to air, which can cause cracking and affect its performance and service life. When not in use temporarily, the filler should be soaked in an appropriate buffer solution.

-Cleaning and regeneration: After use, the filler should be cleaned promptly to remove residual proteins and other impurities. For some reusable fillers, they should be regenerated according to the correct method to restore their performance and facilitate their next use. However, it is important to avoid using overly strong cleaning conditions to prevent damage to the packing.

-Storage conditions: Choose appropriate storage conditions based on the properties of the filler. Generally speaking, for short-term storage, the filler can be soaked in 20% ethanol and placed in a refrigerator at 4 ℃; Long term storage requires stricter conditions, such as freezing at -20 ℃ or lower.

4. Safety precautions

-Personal protection: When operating protein purification fillers, laboratory protective clothing, gloves, masks, goggles, and other protective equipment that meet standards should be worn to prevent harmful chemicals from directly contacting the skin, mouth, nose, and eyes.

-Experimental environment: The protein purification column should be placed on a stable workbench, and the operating environment should be well ventilated, at a suitable temperature, and free of pollutants such as dust and odors.