Chemical Solution
Adjusting the acidity of the liquid solvent ensures optimal recovery of proteins from animal fibers during laboratory analysis. This specific measure, referred to as extraction buffer ph, determines the solubility of keratin and the activity of digestive enzymes like trypsin. Most protocols maintain this value within a strict range to prevent protein degradation.
Deviation from this target compromises downstream mass spectrometry.
Fiber Digestion
Cleavage of disulfide bonds in keratin occurs efficiently only under alkaline conditions. The chemical reaction requires an alkaline environment to swell the fiber structure and allow the reducing agent to penetrate the cortex. Without this precise environment, the tough fiber matrix remains intact and prevents enzymatic access.
Protein Stability
Low acidity prevents the precipitation of extracted proteins and keeps them in solution for analysis. If the environment becomes too acidic, proteins fold back or form insoluble aggregates that settle out of the liquid. This stability is critical for obtaining a representative sample of all fiber proteins.
Test Yield
Maximizing the concentration of recovered peptide markers ensures that even low-level blend components are detected. High recovery rates translate to clear signals during mass spectrometry, which allows laboratories to certify the purity of cashmere or merino wool blends with absolute confidence.
