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
|
- 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.