Shield-1 is a specific, cell-permeant and high-affinity ligand of FK506-binding protein-12 (FKBP), and reverses the instability by binding to mutated FKBP (mtFKBP), allowing conditional expression of mtFKBP-fused proteins.
SLF-amido-C2-COOH (PROTAC FKBP12-binding moiety 1) is a synthetic ligand for FKBP (SLF). SLF-amido-C2-COOH (PROTAC FKBP12-binding moiety 1) can be used in the synthesis of PROTACs.