The present invention relates to metalloprotein inhibitors comprising: a. an organic substituent and at least one zinc binding group (ZBG) covalently attached thereto; or b. a ZBG substituted by a side chain wherein the ZBG is of formula (I): wherein X is O or S and each R1, R2, R3, and R4 is individually hydrogen or an organic radical. The metalloprotein inhibitors are useful for preventing or treating a pathological disease, condition, or symptom that is associated with pathological metalloprotein activity and/or that is alleviated by inhibition of said activity.