CRT, an iron peptide mimic, can bind to apo-transferrin (apo-Tf). CRT can be used to modify nanoparticles, and enhances drug delivery efficiency.
References:
[1]. Liu M , et al. Iron-mimic peptide converts transferrin from foe to friend for orally targeting insulin delivery. J Mater Chem B. 2018 Jan 28;6(4):593-601.