Table 1. Relative activity of Cpur5GT against several potential substrates.

Substrate	Product	Relative activity (%)
Mv3G	Mv3,5dG	100a±2.2
Dp3G	Dp3,5dG	86.8±3.3
Pt3G	Pt3,5dG	18.8±2.3
Cy3G	Cy3,5dG	78.3±12.4
Pn3G	Pn3,5dG	72.4±7.1

Relative activity analyses were performed with UDP-glucose as the donor. The amount of reaction productwas calculated from the area of the HPLC chromatogram recorded at 525 nm. The activity of Cpur5GTagainst malvidin 3-glucoside (Mv3G) was considered 100%, which was used to determine its relativeactivity against other substrates.