protein FAQs

A1. Is FineTest protein active?
Q1. Validated activity has been specified in the protein manual. Please ask our technical staffs to confirm the activity not mentioned before.

A2. What's the protein size?
Q2. The MOQ size is 50μg. But custom size can be also offered according to customers' demand.

A3. Why are proteins tagged? Which tag can you provide?
Q3. Natural protein is not tagged. Tags for some recombinant proteins can improve soluble expression and purification. Fusion and purification tags are designed accordingly(e.g. HIS tag, IF2DI tag, GST tag).

A4. Are biotinylated proteins available? How about biomarkers?
Q4. We can provide biomarkers like HRP, Biotin, FITC etc. But labelling cost is charged. Please contact us for more information.

A5. Can you provide custom protein unavailable in the catalog?
Q5. We provide custom protein and antibody services.

A6. Can I request for free trial size?
Q6. Please ask our sales staff for the free trial size.

A7. How to choose among multiple proteins for the same detection target?
Q7. Differences among multiple proteins include expression region and tag. Please contact our technical staffs for the recommended protein.

A8. What are the storage condition and shelf life?
Q8. Sealed lyophilized proteins are delivered and can be stored at -20℃ or -80℃ for 1 year. Dissolved proteins should be separately stored in experimental size at -20℃ or -80℃ for 3 months. Freeze-thawing step can be just conducted once. The unused protein should be stored at 4 ℃ for 1-2 weeks.

A9. How about the delivery condition?
Q9. Lyophilized proteins are delivered with ice packs.