Table II

Proteins with variable concentrations

R2 is shown for a quadratic fit of abundance versus concentration. LOQ is the limit of quantification in fmol. No. of peptides refers to how many peptides were used in the calibration fit.

Protein nameR2LOQNo. of peptides
Aprotinin0.87304
Carbonic anhydrase0.901010
Ovalbumin (chicken)0.951013
Albumin0.922155
Ribonuclease A0.831006
Casein (α-S1 and -S2)0.99345
β-Lactoglobulin0.88327
Myoglobin (horse)0.89145
Fibrinogen β chain0.96326
Composite0.981331