How about a SNAP or tetracysteine tag? pubs.acs.org/doi/10.1021/...
pubs.acs.org
Releasable SNAP-tag Probes for Studying Endocytosis and Recycling
Site-specific labeling of cellular proteins with chemical probes is a powerful tool for live cell imaging of biological processes. One popular system, known as the SNAP-tag, is based on an engineered ...