Table 4 Principal component regression analysis: principal components PC5 to PC8
From: Evolutionary rates and centrality in the yeast gene regulatory network
| Â | PC5 | PC6 | PC7 | PC8 | ||||
|---|---|---|---|---|---|---|---|---|
| Â | YTN1 | YTN2 | YTN1 | YTN2 | YTN1 | YTN2 | YTN1 | YTN2 |
Percent variance explained by each PC | 10 | 9 | 7 | 8 | 7 | 8 | 2 | 2 |
Effect of PCs on response variables | Â | Â | Â | Â | Â | Â | Â | Â |
   dN | -0.067 | -0.170 | -0.127 | 0.109 | -0.144 | -0.188 | -0.088 | -0.213 |
   dS | 0.055 | 0.078 | -0.043 | 0.034 | -0.131 | -0.249 | 0.011 | 0.074 |
   dS' | 0.081 | 0.050 | 0.022 | 0.046 | -0.195* | -0.251* | -0.014 | -0.073 |
   dN/dS | -0.045 | -0.209* | -0.052 | 0.098 | -0.167* | -0.106 | -0.103 | -0.147 |
   dN/dS' | -0.081 | -0.201* | -0.117 | 0.093 | -0.114 | -0.102 | -0.083 | -0.143 |
   Residuals dN-dS | -0.089 | -0.203* | -0.119 | 0.103 | -0.108 | -0.118 | -0.089 | -0.200 |
Contribution of predictor variables to each PC | Â | Â | Â | Â | Â | Â | Â | Â |
   CAI | 0.194 | 0.624 | 0.501 | -0.279 | -0.485 | 0.027 | -0.022 | -0.025 |
   Expression level | -0.255 | -0.366 | 0.025 | 0.178 | 0.539 | 0.603 | 0.001 | -0.032 |
   Expression variability | 0.400 | 0.447 | 0.377 | 0.098 | 0.518 | 0.630 | -0.010 | -0.020 |
   k in | 0.101 | -0.060 | -0.505 | 0.328 | -0.139 | -0.296 | 0.549 | 0.567 |
   k out | -0.353 | -0.090 | 0.584 | -0.691 | -0.062 | 0.177 | 0.370 | 0.354 |
   Centrality | -0.026 | -0.086 | -0.102 | -0.023 | -0.083 | -0.170 | -0.741 | -0.738 |
   Essentiality | -0.192 | -0.125 | -0.022 | 0.367 | 0.402 | 0.277 | -0.049 | -0.063 |
   GO | 0.752 | 0.492 | 0.012 | 0.400 | 0.121 | -0.119 | 0.098 | 0.047 |