. 2019 Oct 4;47(21):10994–11006. doi: 10.1093/nar/gkz841

Table 2.

Differences of repetitive region lengths in evolutionarily distinct groups of organisms

Database name	Number of proteins	Number of proteins with STRs	% of proteins with STRs	Median^a	Average^a	Standard deviation^a	Number of clusters^b
UniProtKB/Swiss-Prot (total)	554 241	28003	5.05%	14.75	15.14	3.69	6237
Archaea	19 525	351	1.80%	10.71	10.63	1.27	45
Bacteria	333 691	6794	2.04%	17.38	17.45	2.66	1048
Euk: Fungi	33 613	3996	11.89%	13.46	13.79	3.65	893
Euk: Invertebrata	27 607	3372	12.21%	17.34	18.62	7.95	812
Euk: Vertebrata	18 292	1461	7.99%	13.66	13.90	2.42	1801
Euk: Plants	42 101	3601	8.55%	12.51	12.82	2.98	795
Viruses	16 852	889	5.28%	14.07	14.15	2.57	203

^aRepetitive region length, measured in amino acid residues.

^bClustering was used to define repeat classes. Should a protein contain three different, co-localized STRs, the clustering method will produce 6 clusters: three with regular STRs and three with fused repeats. See also supplementary material for more information.