TABLE 7.

Amino acids that are fixed in all SIG1 copies in a given species or isolate but differ between T. guillardii and T. pseudonana and T. weissflogii isolates from Long Island Sound, Portugal, the South Pacific, and Hawaii.

Isolate	Amino acids at the following positionsa
	1	11	14	25	32	37	40	44	47	48	50	54	59	63	67	72	74	75	78	93	94	96	106	116	120	126	127	128	129	133	137	139	140	144	146	147		148	149	150	151	153	154	169	170	173	174	176	184
Long Island Sound clone Actin	S	F	A	K	R	A	T	H	I	I	A	L	I	F	S	T	I	A	A	I	N	L	A	K	S	Q	G	E	R	N	F	A	N	H	R	A	—	A	E	V	V	R	D	A	F	H	G	T	V
Portugal	.	.	.	.	.	S	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
South Pacific	.	.	.	.	.	.	.	.	.	V	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	Y	R	.	.	A
Hawaii	.	.	.	.	.	.	.	.	.	V	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	Y	.	.	.	A
T. guillardii	.	W	.	M	K	.	S	.	.	V	T	V	T	Y	E	N	.	.	.	A	V	.	V	.	N	.	.	D	.	S	.	.	Q	N	.	.	.	S	T	.	P	.	.	.	.	Y	.	V	S
T. pseudonana	P	W	S	.	K	F	A	S	V	V	T	V	T	Y	A	N	L	D	G	G	S	Q	.	N	H	T	—	.	G	.	Y	G	K	L	A	G	R	L	S	I	T	T	N	S	Y	Y	N	V	M

^aThe positions are numbered relative to the first predicted amino acid of the open reading frame. Lightface roman type indicates conservative changes, italic type indicates moderate changes, and boldface roman type indicates radical changes relative to the reference Long Island Sound clone Actin isolate. A dot indicates that the amino acid is identical to the amino acid in the reference sequence; dashes indicate introduced alignment gaps.