Table 2

Functional classification of RAFL cDNA clones.

Functional categoryNo. of predicted genesNo. of RAFL cDNA clones*
Metabolism757 521 (68.8%)
Energy122 98 (80.3%)
Cell growth, cell division, and DNA synthesis96 54 (56.3%)
Transcription583 331 (56.8%)
Protein synthesis170 145 (85.3%)
Protein destination236 169 (71.6%)
Transport facilitation252 151 (60.0%)
Cellular transport and transport mechanisms119 89 (74.8%)
Cellular biogenesis177 107 (60.5%)
Cellular communication/signal transduction482 262 (54.4%)
Cell rescue, defense, death, and aging325 172 (52.9%)
Ionic homeostasis4 4 (100%)
Cellular organization365 255 (69.9%)
Motility1 0 (0%)
Development75 40 (53.3%)
Transposable elements and viral and plasmid proteins132 2 (1.5%)
Organism-specific proteins1 0 (0%)
Classification not yet clear-cut691 398 (57.6%)
Unclassified proteins17,213 8,745 (50.8%)
Protein kinase1,067 506 (47.4%)
Transcription factor1,533§ 1,087 (70.9%)
  • * The number of RAFL cDNA clones corresponding to the predicted genes in each category was calculated with the BLAST program. The percentages of the RAFL cDNA clones in each category are given in parentheses.

  • These numbers represent the number of predicted genes in each category of the MIPS functional catalog (29).

  • This number represents the number ofArabidopsis protein kinase genes in the PlantsP database (28).

  • § A recent paper (27) estimates 1533 genes coding for transcription factors inArabidopsis.