SETDB1-TTD-IN-1 TFA is a potent, selective and endogenous binder competitive ligand of SET domain bifurcated protein 1 tandem tudor domain (SETDB1-TTD) that binds to TTD, with a Kd of 88 nM. SETDB1-TTD-IN-1 TFA increases SETDB1 methyltransferase activity. SETDB1-TTD-IN-1 TFA can be used for the research of biological functions and disease associations of SETDB1-TTD[1][2].