This article summarizes my research in biomimetic chemistry on the des
ign and study of functional models for the active sites of metalloprot
eins such as hemoglobin, myoglobin, and cytochrome c oxidase. Particul
ar emphasis is placed on the results which have shed light on aspects
of biological systems hidden from view by the large protein components
of the biological molecules. This account was presented in the form o
f a lecture at the ACS National Meeting, San Francisco, April 1997. Th
e lecture was given in acceptance of the Alfred Bader Award in Bioinor
ganic or Bioorganic Chemistry.