Table I.

AO activity of wild-type and surI mutant seedlings of Arabidopsis using IAld and IAAld as the substrates

SubstrateActivity
Wild typesur1
pmol product min−1 mg−1 protein
IAld54.5186.9
IAAld22.2119.5

The activity was assayed by determining the amounts of ICA and IAA formed during the reaction, as described in Methods. Two independent experiments each with two assays were carried out and one typical result is presented here.