PICK ‘n POST™ molecular weight determination by LC-ESI-MS protein analysis for proteins up to 250 kDa
Our ESI-MS intact mass service can be used to:
- Determine the mass weight of peptides and proteins in your sample up to 250 kDa.
- Compare samples – batch to batch variation.
- Determine purity of your sample.
- Look for modification such as glycosylations, acetylations, oxidations, etc..
The accuracy is within 30 ppm (+/-3 Dalton for a 100 kDa protein).
We provide this service as PICK ‘n POST™ which means that you can expect your results in 4-8 days.
When would I choose ESI-MS protein analysis over MALDI-MS for molecular weight determination?
You should select ESI-MS protein analysis when you want to determine the mass weight of peptides and proteins in your sample above 50 kDa.
If you have further needs
- You want detailed information about exact molecular weight of several proteins in your sample.
- You want information about post translational modifications.
Send us a request, so we can enter dialogue with you and meet your specific needs.