Table 1 ion peak identified through MALDI-TOF mass

From: Spectral and biomolecular evidence from fibers of two Hexi Corridor ancient turquoise mining sites

Ion peak (m/z)

Peptide sequences48

Source of keratin

851

GLTGGFGSR

Keratin Type II intermediate filament

951

LYEEEIR

969

LQFYQNR

1011

DVDCAYLR

1263

TKEEINELNR

1151

ETMQFLNDR

Keratin Type I microfibrillar

1170

ETM*QFLNDR

1486

QNQEYQVLLDVR

1504

Q*NQEYQVLLDVR

1835

TVNALEVELQAQHNLR

2144

SQQQEPLVC*PNYQSYFR

  1. C* Cysteine carbamidomethylation, M* Methionine oxidation, Q* pyro-glutamic acid generated via cyclization of the N-terminal glutamine (Q).