3.2.1.68	down	the isoform ISA1 transcript level is low during starch degradation	
3.2.1.68	additional information	isoform ISA2 transcript is relatively abundant during periods of either starch biosynthesis or catabolism	
3.2.1.68	up	the isoform ISA1 transcript level is elevated in tissues where starch is synthesized	
3.2.1.68	up	the expression of isoform ISA2 is higher than that of the other two isoforms ISA1 and ISA3 in tuberous root at 109 days after planting