Table 1. The 27 organisms, their SR repertoire and databases used.

Organism	#SRs	Reference	Database
Glycine max	25*	EH	[89]
Populus trichocarpa	20	EH	[89]
Arabidopsis thaliana	18	[70]	[90]
Vitis vinifera	9	EH	[89]
Zea mays	22	EH	[91]
Sorghum bicolor	19*	EH	[89]
Oryza sativa	22	[44]	[92]
Selaginella moellendorffi	3*	EH	[89]
Physcomitrella patens	10	EH	[89]
Chlamydomonas reinhardtii	5	EH	[89]
Chlorella vulgaris	3*	EH	[89]
Cyanidioschyzon merolae	2	EH	[93]
Homo sapiens	11	[64]	[94]
Mus musculus	10	EH	[94]
Gallus gallus	10	EH	[94]
Xenopus tropicalis	11	EH	[94]
Danio rerio	14	EH	[94]
Branchiostoma floridae	11	EH	[95]
Ciona intestinalis	8	EH	[95]
Drosophila melanogaster	7	[65]	[96]
Anopeheles gambiae	6	EH	[94]
Aedes aegypti	6	EH	[94]
Caenorhabditis elegans	7	[66]	[97]
Schizosaccharomyces pombe	2	[37]	[98]
Dictyostelium discoidum	2	EH	[98]
Plasmodium falciparum	3	EH	[99]
Phytophthora sojae	3	EH	[95]

Organisms are listed according to their groupings in Figures S2, S3, S4, S5, S6, S7.

*, These organisms may have more SRs than listed due to the exclusion of sequences that did not begin with methionine residues; EH, Extracted here.