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Table 4 Spiking recovery in human seruma

From: Assessment of proteolytic degradation of the basement membrane: a fragment of type IV collagen as a biochemical marker for liver fibrosis

Peptide concentration, ng/mL Peptide serum + peptide concentration, ng/mL Peptide recovered, ng/mL Recovery, %
31.1 145.3 31.1 103.5
13.4 135.3 13.3 110.4
7.6 125.7 7.6 107.6
4.7 121.6 4.7 106.7
0 109.2 0 100
  1. aPeptide sample = native type IV collagen cleaved by matrix metalloproteinase 9 and pepsin. Recovery percentages are peptide concentrations compared to peptide measured in serum after subtracting the serum background.