Table 3.

Transcription factor families identified and their proportions in seven microalgae

TF family		Tisochrysis lutea	Pavlova sp	Emiliania huxleyi	Phaeodactylum tricornutum	Nannochloropsis gaditana	Porphyridium purpureum	Chlamydomonas reinhardtii
B3	ABI3/VP1	1 (0.65)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
AP2/ERF	AP2	1 (0.65)	1 (0.78)	58 (12.13)	0 (0)	2 (2.15)	0 (0)	6 (2.83)
	ERF	1 (0.65)	6 (4.69)	99 (20.71)	2 (1.02)	2 (2.15)	0 (0)	9 (4.25)
bHLH		0 (0)	0 (0)	0 (0)	8 (4.08)	3 (3.23)	3 (1.51)	8 (3.77)
bZIP		3 (1.94)	3 (2.34)	6 (1.26)	25 (12.76)	11 (11.83)	21 (10.55)	20 (9.43)
C2C2	CO-like	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
	Dof	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
	GATA	5 (3.23)	1 (0.78)	4 (0.84)	0 (0)	0 (0)	2 (1.01)	12 (0.66)
	LSD	1 (0.65)	1 (0.78)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
C2H2		8 (5.16)	8 (6.25)	37 (7.74)	4 (2.04)	5 (5.38)	60 (30.15)	5 (2.36)
C3H		13 (8.39)	7 (5.47)	47 (9.83)	11 (5.61)	5 (5.38)	8 (4.02)	22 (10.38)
CCAAT		3 (1.94)	0 (0)	2 (0.42)	3 (1.53)	3 (3.23)	3 (1.51)	1 (0.47)
CPP		1 (0.65)	0 (0)	4 (0.84)	5 (2.55)	1 (1.08)	2 (1.01)	3 (1.42)
CSD		3 (1,94)	4 (3.13)	25 (5.23)	5 (2.55)	1 (1.08)	3 (1.51)	2 (0.94)
DBB		0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.50)	0 (0)
E2F/DP		2 (1.29)	3 (2.34)	3 (0.63)	5 (2.55)	1 (1.08)	3 (1.51)	3 (1.42)
Fungal TRF		14 (9.03)	8 (6.25)	27 (5.65)	1 (0.51)	10 (10.75)	0 (0)	0 (0)
GARP	G2-like	4 (2.58)	4 (3.13)	5 (1.05)	2 (1.02)	0 (0)	2 (1.01)	4 (1.89)
	ARR-B	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
Homeobox	HB-other	16 (10.32)	14 (10.94)	28 (5.86)	0 (0)	0 (0)	2 (1.01)	1 (0.47)
	TALE	1 (0.65)	1 (0.78)	0 (0)	4 (2.04)	0 (0)	9 (4.52)	3 (1.42)
HSF		9 (5.81)	8 (6.25)	8 (1.67)	67 (34.18)	4 (4.30)	1 (0.50)	2 (0.94)
LIM		2 (1.29)	3 (2.34)	11 (2.30)	0 (0)	0 (0)	2 (1.01)	1 (0.47)
MADS-box	M-type	3 (1.94)	1 (0.78)	1 (0.21)	0 (0)	0 (0)	2 (1.01)	2 (0.94)
mTERF		5 (3.23)	0 (0)	6 (1.26)	5 (2.55)	2 (2.15)	5 (2.51)	4 (1.89)
MYB	MYB (3R)	1 (0.65)	0 (0)	3 (0.63)	2 (1.02)	5 (5.38)	1 (0.50)	1 (0.47)
	MYB (2R)	25 (16.13)	20 (15.63)	39 (8.16)	11 (5.61)	8 (8.60)	23 (11.56)	10 (4.72)
	MYB-rel	21 (13.55)	15 (11.90)	51 (10.69)	7 (3.57)	7 (7.53)	7 (3.52)	18 (8.65)
	MYB-SHAQKYF	1 (0.65)	2 (1.56)	1 (0.21)	7 (3.57)	8 (8.60)	16 (8.04)	4 (1.89)
NF-X1		0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
NF-Y	NF-YA	0 (0)	1 (0.78)	1 (0.21)	1 (0.51)	1 (1.08)	1 (0.50)	0 (0)
	NF-YB	1 (0.65)	1 (0.78)	4 (0.84)	2 (1.02)	2 (2.15)	3 (1.51)	3 (1.42)
	NF-YC	3 (1.94)	4 (3.13)	1 (0.21)	8 (4.08)	6 (6.45)	6 (3.02)	2 (0.94)
Nin-like		0 (0)	1 (0.78)	0 (0)	0 (0)	1 (1.08)	4 (2.01)	15 (7.08)
S1Fa-like		0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
SBP		0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	23 (10.85)
Sigma-70		4 (2.58)	4 (3.13)	2 (0.42)	8 (4.08)	4 (4.30)	8 (4.02)	1 (0.47)
TUB		3 (1.94)	7 (5.47)	5 (1.05)	3 (1.53)	1 (1.08)	0 (0)	6 (2.83)
VARL		0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	12 (5.66)
Whirly		0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
WRKY		0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	1 (0.47)
	Total	155	128	478	196	93	199	212

ERF Ethylene Response Factor, bHLH basic helix-loop-helix, bZIP basic leucine zipper, CSD Cold Shock Domain, DBB Double B-box, TRF Transcriptional Regulatory Factor, HSF Heat Shock Factor, mTERF mitochondrial transcription termination factor, SBP SQUAMOSA promotor binding protein, VARL Volvocine Algal RegA Like. Numbers in parentheses correspond to percentage of each family for each species. For the total number of TFs, number in parentheses corresponds to percentage of the predicted proteome dedicated to TFs