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Protein assay, Sigma-Aldrich
May 2005
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Sigma's Protein AQUA technology enables ultrasensitive absolute protein quantitation using stable isotope-labeled peptides and mass spectrometry. Custom AQUA peptides are synthesized using fully labeled 98 atom % 13C- and 98 atom % 15N-enriched amino acids (one labeled amino acid per peptide) and are manufactured to ensure high purity (HPLC), accurate molecular weight (MALDI-TOF MS), and specific peptide content.
 
Custom AQUA peptides are available in small (5 x 1 nmol) package sizes to enable convenient sample preparation and provide an appropriate peptide amount. Protein AQUA is appropriate for applications such as differential protein expression, biomarker quantification and RNAi unctional validation.
 
Sigma-Aldrich
www.sial.com

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