aaRS	Aminoacyl-tRNA synthetase
BTTAA	2-[4-((bis[(1-tert-butyl-1H-1,2,3-triazol-4-yl)methyl]- amino)methyl)-1H-1,2,3-triazol-1-yl]acetic acid
CuAAC	Copper(I)-catalzyed azide-alkyne cycloaddition
cw	Continuous wave
DEER	Double electron-electron resonance
DODA	1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid
DOTA	1,4,7,10-tetraazacyclododecane-1,4,7,10-tetra-acetic acid
DTPA	Diethylene triamine pentaacetic acid
EPR	Electron paramagnetic resonance
Gd(III)	Gadolinium
MTSL	Methanethiosulfonate spin label
ncAA	Noncanonical amino acids
SDSL	Site-directed spin labeling
SPAAC	Strain-promoted azide-alkyne click reaction
SPIEDAC	Strain-promoted-inverse-electron-demand Diels–Alder cycloadditions
T4L	T4-lysozyme
THPTA	Tris- [(1-hydroxy-propyl-1H-1,2,3-triazol-4-yl)methyl]amine