Table I Protein quantitation for artificially biased data

The mean 14N:15N ratios were within 0.02 of the median in all cases (data not shown). Bold values are averages.

14N:15N ratioNo. of proteins ≥ 1 peptideaNo. of proteins ≥ 2 peptidesbMediancMindMaxeS.D.f
0.8:11471060.860.631.310.11
3992250.940.701.360.10
4692640.790.551.300.09
0.860.631.330.10
1:1133841.010.721.490.15
3331921.020.681.460.13
3682121.040.671.680.12
1.020.691.540.13
1.2:1122621.280.921.630.16
3631891.140.831.760.13
5853791.200.681.740.16
1.210.811.710.15
  • a The number of proteins identified in each experiment with at least one peptide.

  • b The number of proteins identified in each experiment with at least two peptides.

  • c The median of 14N:15N ratios.

  • d The minimum of 14N:15N ratios.

  • e The maximum of 14N:15N ratios.

  • f The S.D. of 14N:15N ratios.