Fig. 1.

Classification of A. thaliana genes according to the presence of homologous genes in other organisms. The amino acid sequences of all of the predicted genes of A. thaliana were used as the query in a tblastn similarity search with the moss, yeast, fruit fly, and cyanobacterial data sets. The outermost circle represents all of the A. thaliana genes. The inner circles, which are labeled Moss, Eukaryotes, and Cyanobacterium, represent genes that have similarity to moss contigs, budding yeast and fruit fly coding sequences, and cyanobacterium coding sequences, respectively. The areas depicted are not proportional to the actual gene numbers, and the number of A. thaliana genes in each category is written in each segment.