Plant nitrilase activity contributes only to the minor pathway of benzylglucosinolate metabolism in P. rapae larvae.

Feces were collected from P. rapae larvae that had fed on leaves of A. thaliana of the given genotypes. Glycine conjugates 5 and 6 were quantified in feces extracts by HPLC-MS using 13C-labeled standards. Means ± SD are given with N as the number of biological replicates. Each replicate represents a pair of larvae. The asterisk indicates a significant difference (Mann-Whitney U-test, P = 0.001).