Table 1.

SIT genes with confirmed full‐length sequences, predicted protein domains, and phylogenetic clade. Dashes indicate genes where data are not applicable

Organism	Species	ID	Model modified	TM (#)	Coil	S‐enriched	Gene clade
Multipolar diatom (Thalassiosirales)	Thalassiosira pseudonana b , c	JGI: 268895	Yesa	10	No	No	E
		JGI: 41392	Yesa	10	No	No	E
		JGI: 35133	Yesa	10	No	No	E
Pennate diatom	Fragilariopsis cylindrus b	JGI: 212017	No	10	Yes	No	A
		JGI: 263777	Yes	10	Yes	No	A
		JGI: 264054	Yes	10	Yes	No	A
		JGI: 157255	Yes	10	No	Yes	B
		JGI: 138651	Yes	10	No	Yes	B
		JGI: 186485	Yes	10	No	No	C
		JGI: 211148	No	10	Yes	No	D
Pennate diatom	Pseudo‐nitzschia multiseries b	JGI: 338021	No	10	Yes	No	A
		JGI: 261458	No	10	Yes	No	A
		JGI: 297536	Yes	10	No	Yes	B
		JGI: 338018	Yes	30	No	Yes	B
		JGI: 338017	No	10	Yes	No	D
Pennate diatom	Phaeodactylum tricornutum d	JGI: 23423	‐	10	No	No	C
		JGI: 48707	‐	10	No	No	C
		JGI: 11311	‐	10	No	Yes	B
Pennate diatom	Cylindrotheca fusiformis e	NCBI: AF052458	‐	10	Yes	No	A
		NCBI: AF052454	‐	10	Yes	No	A
		NCBI: AF052456	‐	10	Yes	No	A
		NCBI: AF052455	‐	10	Yes	No	A
		NCBI: AF052457	‐	10	Yes	No	A
Pennate diatom	Nitzschia alba c	NCBI: DQ256058	‐	10	Yes	No	A
Multipolar diatom (Thalassiosirales)	Skeletonema costatum c	NCBI: DQ256065	‐	10	No	No	E
Choanoflagellate	Stephanoeca diplocostata f	NCBI: HE981737	‐	10	No	No	Non‐diatom
		NCBI: HE981736	‐	10	No	No	Non‐diatom
		NBCI: HE981735	‐	10	No	No	Non‐diatom

^aNot different from full‐length transcribed sequences determined by Thamatrakoln et al. 2006.

^bFull‐length sequences identified by this study.

^cFull‐length sequences identified by Thamatrakoln et al. (2006).

^dFull‐length sequences identified by Sapriel et al. (2009).

^eFull‐length sequences identified by Hildebrand et al. (1998).

^fFull‐length sequences identified by Marron et al. (2013).