Table 1

Kinetics of digestion1 of the resistant starch assay for Wt and sbe1a mutant starch2




k1 (min-1)


k2 (min-1)


-5.4 ± 2.3a

85.9 ± 3.5b

1.4 ± 0.1a (×10-2)

17.9 ± 5.4a

0.9 ± 0.2a (×10-3)


13.7 ± 2.8b

59.8 ± 3.0a

1.8 ± 0.1b (×10-2)

24.3 ± 2.4a

3.0 ± 1.1b (×10-3)

1 Kinetic parameters are obtained from model fit using the double exponential decay equation:

where y is % NDS, x is the time, y0 is the y-value that the model asymptotically approaches, S1 and S2 are the concentrations of the two different substrate components, and k1 and k2 are the reaction rate constants for the decay of the two different components.

2 Values are expressed as mean ± SD for three biological replications. Values for each biological replication were obtained from fit of combined data from two independent digestions. Significant differences (p < 0.05) in the same column, as determined by one-way ANOVA analysis, are indicated by different superscripts.

Xia et al. BMC Plant Biology 2011 11:95   doi:10.1186/1471-2229-11-95

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