%0 Journal Article %T New Kid on the Block %A Thomas Reinheckel %J Theranostics %D 2017 %I Ivyspring International Publisher %R 10.7150/thno.21603 %X Cysteine cathepsins are a group of proteases involved in many physiological and pathological processes. Yet, the selective detection and inhibition of individual cathepsins is still challenging. This editorial is discussing the context of a recent work introducing a designed ankyrin repeat protein (DARPin) as novel approach for selective targeting of the protease cathepsin B. %K Cathepsin B %K DARPin %K protease inhibition %K protease imaging %U http://www.thno.org/v07p2965.htm