Mass Spectrometry Proteomic Profiling for Fine Animal Fiber Verification
LC-MS/MS proteomic profiling quantifies species-specific keratin peptide markers, bypassing optical scale damage to verify fine animal fiber purity.
Keratin Biomarkers
Biological Indicator
Molecular signatures found within the structural proteins of animal hair allow for the precise identification of the species of origin. Keratin biomarkers are unique sequences of amino acids that differ between sheep, goats and other fiber producing animals. These markers remain stable even after the wool has been processed into yarn and dyed.
They are the primary targets for proteomic analysis in textile testing labs. Because they are part of the physical structure of the hair, they cannot be removed by washing.
Molecular Profile
Mapping the arrangement of these peptides creates a fingerprint for each animal type. Detecting keratin biomarkers involves the use of high resolution mass spectrometry to find specific mass to charge ratios. This data is compared against a database of known animal species.
The presence of a particular marker confirms the inclusion of that fiber in the blend.
Diagnostic Utility
Distinguishing between very similar fibers is the main application for this technology. While sheep wool and cashmere look similar under a microscope, their keratin biomarkers are distinctly different. This allows for the detection of even small amounts of sheep wool added to a cashmere garment.
It provides a level of certainty that visual methods cannot match.
Forensic Precision
Scientific evidence from these tests is used to support legal claims and quality guarantees. Relying on keratin biomarkers makes it nearly impossible for a supplier to pass off a cheaper fiber as a luxury material. This technology has become the gold standard for high end apparel verification.
It protects both the brand reputation and the consumer.