TABLE 1.

Localization of maternal transcripts in the oocytes of the Xenopus laevis.

Pathway	RNAs	Stages and localization	References
Early pathway/METRO	Xdazl	I-uniform, II-IV-migration to the vegetal pole	1
	dazl	I-MC, III-IV-vegetal pole	2
	Xcat2	I-MC, but still in the cytoplasm, IV-vegetal pole	1
	Xcat2	I-MC, II-vegetal pole	3
	Xcat2	I-MC, but still in the cytoplasm, II-MC, vegetal pole	4
	Xlsirt	I-MC and cytoplasm, II-vegetal pole	4
	Xlsirt	II-MC, III-vegetal pole	5
	Xlsirt	II-MC, IV-vegetal pole	6
Late pathway	Vg1	II-III-around the nucleus, III-VI-migration to the vegetal pole	1
	Vg1	I-II-everywhere, III-IV-vegetal pole	3
	Vg1	I-cytoplasm, II-migration to the vegetal pole, III-vegetal pole with continuing streaming	4
	Vg1	I-everywhere, III-vegetal pole (but still migrating)	5
	Vegt	I-uniformly distributed, IV-vegetal pole	2; 7
Intermediate pathway	fatvg	I-cytoplasm, II-MC, III-V-migration to the vegetal pole	8
	Hermes	I-cytoplasm, early II-MC, II-III-accumulation at the vegetal cortex, IV-vegetal cortex	9
Animal pathway	PABP	VI	10
	β-tubulin	VI	11
	An1	I-III-uniform, IV-animal pole	12
	An2	I-III-uniform, IV-animal pole	12
	An3	I-III-uniform, IV-animal pole	12
	An4a	VI	12
Summary scheme of the oocyte stages where the majority (darker shades) of the transcript relocalization is occurring

References: 1. Reviewed by King et al. (1999), 2. Houston (2013), 3. Forristall et al. (1995), 4. Kloc and Etkin (1995), 5. Kloc and Etkin (1998), 6. Kloc et al. (1993), 7. Zhang and King (1996), 8. Chan et al. (1999), 9. Zearfoss et al. (2004), 10. Schroeder and Yost (1996), 11. Yisraeli et al. (1990), 12. Reviewed by Schnapp et al. (1997).