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- Ethylene biosynthesis and action in tomato: a model for climacteric fruit ripening

Table 1. Some examples of ripening related genes that exhibit ethylene-enhanced expression

Gene	Homology	Function	Reference

LEACS2	ACC synthase	Catalyses system 2 ACC formation	Barry et al., 2000
LEACS6	ACC synthase	Catalyses system 1 ACC formation	Barry et al., 2000
LEACO1, 3	Dioxygenase, ACC oxidase	Catalyses C₂H₄ formation	Barry et al., 1996
E4	Methionine sulphoxide reductase protein	Unknown	Lincoln et al., 1987
E8	Dioxygenase	Unknown	Lincoln et al., 1987
ER24	Transcriptional co-activator MBF1	Link EREBPs to TATA box binding protein	Zegzouti et al., 1999
ER49	Translation elongation factor EF-Ts	Post-transcriptional regulation	Zegzouti et al., 1999
ER68	RNA helicase DBP2	Post-transcriptional regulation	Zegzouti et al., 1999
ER50	Arabidopsis CTR1	Negative regulator of ethylene signal transduction	Zegzouti et al., 1999
LeRab11a	Rab GTPase	Trafficking of cell-wall modifying enzymes	Lu et al., 2001
TomloxA, B, C	Lipoxygenase	Hydroperoxidation of polyunsaturated fatty acids	Griffiths et al., 1999a
PG	Polygalacturonase	Depolymerizes cell wall pectins	Nicholass et al., 1995; Sitrit and Bennett, 1998
PME	Pectin methylesterase	Maintains tissue integrity in senescent fruit	Hall et al., 1994
LeEXP1	Expansin	Disrupts hydrogen bonds in wall matrix	Rose et al., 1997

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