Investigated FRET substrates for coronavirus M^pros^a.

FRET substrate	Structure	Length (amino acids)
Blanchard	2-Abz-SVTLQ↓SGY(NO2)R	10
Blanchard-VV	2-Abz-VVTLQ↓SGY(NO2)R	10
PEDV 1	2-Abz-YNSTLQ↓SGY(NO2)R	11
PEDV 2	2-Abz-NSTLQ↓SGY(NO2)R	10
PEDV 3	2-Abz-STLQ↓SGY(NO2)R	9
PEDV 4	2-Abz-STLQ↓AGY(NO2)R	9
(−) FRET (neg. control)	2-Abz-STLAAGY(NO2)R	9

^aAbbreviations: 2-Abz, 2-aminobenzoic acid; Y^(NO₂), 3-nitrotyrosine.