Table 2.

Distribution of toxin/antitoxin/toxin-unclassified proteins over COG groups and over chromosomes and plasmids

	Cellular processing			Information storage and processing			Metabolism			Poorly characterized			Not in COGs
	Avg. prot. Len.	Avg. % of disord. AAs	Num. of proteins	Avg. prot. Len.	Avg. % of disord. AAs	Num. of proteins	Avg. prot. Len.	Avg. % of disord. AAs	Num. of proteins	Avg. prot. Len.	Avg. % of disord. AAs	Num. of proteins	Avg. prot. Len.	Avg. % of disord. AAs	Num. of proteins
Archaea
chromosome
toxin	86.48	26.543	47	99.32	22.849	46	242	6.198	1	130.14	11.476	328	116.06	15.344	126
antitoxin	77.8	27.634	10	88.57	36.007	47	629	0.476	1	113.67	17.169	243	88.37	37.091	218
unclassified	353.48	11.602	23,786	292.79	13.823	35,181	346.28	8.793	65,161	290.67	10.437	43,957	246.85	12.514	137,096
plasmid
toxin	–	–	0	–	–	0	–	–	0	153	4.575	1	–	–	0
antitoxin	–	–	0	–	–	0	–	–	0	–	–	0	68	8.823	1
unclassified	482.52	17.609	100	449.56	21.676	198	347.38	20.904	55	401.25	18.528	98	234.35	21.621	1042
Bacteria
chromosome
toxin	109.2	21.259	566	134.46	19.733	217	210.61	13.186	114	144.9	15.596	3127	120.5	19.746	1021
antitoxin	87.32	42.618	481	115.7	36.092	1493	378.66	11.817	12	106.33	32.195	1336	107.75	37.682	1549
unclassified	388.79	17.384	815,045	329.47	17.496	695,033	377.01	11.161	1,435,900	303.64	15.268	738,635	289.74	16.839	4,584,662
plasmid
toxin	109.36	23.104	41	110.57	23.417	19	256.61	13.998	13	136.46	17.357	243	139.3	17.328	86
antitoxin	86.45	48.819	48	99.33	43.268	99	–	–	0	111.05	39.203	106	111.2	41.965	130
unclassified	399.3	17.976	17,210	326.23	18.968	19,305	386.8	11.417	29,551	313.49	16.074	15,407	256.96	20.259	165,363