QPrEST GLNA Mass Spectrometry Protein Standard

Glutamine synthetase
Recommended Applications
Product Description
Stable isotope-labeled standard for absolute protein quantification of GLNA.
Lys, Arg 13C and 15N metabolically labeled recombinant protein fragment.
Alternative Gene Names
Glutamate decarboxylase, Glutamate--ammonia ligase
Product Number
Unit Size
≥ 1 nmol
On Demand
ETA 6 weeks
Target Protein
Glutamine synthetase
Target Gene
Sequence with Theoretical Peptides
External Data for Theoretical Tryptic Peptides
Fusion Tag
A purification and quantification tag (QTag) consisting of a hexahistidine (His6) sequence followed by an Albumin Binding Protein (ABP) domain derived from Streptococcal Protein G
Expression Host
E. coli LysA ArgA BL21(DE3)
Purification Method
IMAC purification
Gently mix before use. Avoid repeated freeze-thaw cycles.
≥90% as determined by Bioanalyzer Protein 230 Purity Assay
Theoretical MW
34 kDa including tags
Isotopic Incorporation
Unit Size
≥ 1 nmol supplied in 2 aliquotes
Concentration Determination
Concentration determined by LC-MS/MS using a highly pure and amino acid analyzed QTag as internal standard for targeted quantification of the heavy labeled QPrEST. (CV%<10)
Lyophilized in 100 mM Tris-HCl 5% Trehalose, pH 8.0
Instructions for Reconstitution
Spin vial before opening. Add 100 μL distilled H2O to the vial and vortex for 30 seconds. Spin down. For further dilution see Application Protocol.
Unit Size
≥ 1 nmol
Current Lot
Produced on demand. Estimated shipping date is 6 weeks after placed order. Contact support@atlasantibodies.com for more information.
[This part should be hidden or updated after call to Current Batch]
Product Data Sheet
Absolute Quantification of protein using Mass Spectrometry
Produced On Demand. Validation data not established.
Protein Name
Glutamine synthetase
Alternative Protein Names
Glutamate decarboxylase, Glutamate--ammonia ligase
Gene Name
Alternative Gene Names
Glutamate decarboxylase, Glutamate--ammonia ligase
UniProt ID
Shipped at ambient temperature
Lyophilized product should be stored at -20°C for up to 1 year.

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