Table 2.

Comparison between the predicted protein-coding gene set of D. discoideum and those of other organisms.

Species	D.discoideum	P. falciparum	S. cerevisiae	A. thaliana	D. melanogaster	C. elegans	Human
Feature
Genome size (Mb)	34	23	13	125	180	103	2,851
Number of genes	12,5001	5,268	5,538	25,498	13,676	19,893	22,287
Gene spacing (kbp/gene)	2.5	4.3	2.2	4.9	13.2	5.0	127.9
Mean gene length (bp)	1,756	2,534	1,428	2,036	1,997	2,991	27,000
Mean coding size (amino acids)	518	761	475	437	538	435	509
% genes with introns	69	54	5	79	38	5	85
Mean intron size (bp)	146	179	ND	170	ND	270	3,365
Mean no. of introns (in spliced genes)	1.9	2.6	1.0	5.4	4.0	5.0	8.1
Total a.a. encoded (thousands)	7,021	4,009	2,471	11,143	7,358	9,038	11,333
Codon A+T bias2	86	83	62	57	50	64	41
Mean A+T% (exons)	73	76	72	72	45	58	55
Mean A+T% (introns)	88	87	51	55	38	71	62
Mean A+T% (intergenic)	85	86	51	56	38	72	62

¹See text. The estimated number of true transcripts for D. discoideum is given here for comparability with other species; the total predicted gene number of 13,541 is used in calculating the figures below.

²Percentage of all codons used which have A/T at their third base.