The interplay between simulations at various levels of hydration and e
xperimental observables has led to a picture of the role of solvent in
thermodynamics and dynamics of protein systems. One of the most studi
ed protein-solvent systems is myoglobin, which serves as a paradigm fo
r the development of structure-function relationships in many biophysi
cal studies. We review here some aspects of the solvation of myoglobin
and the resulting implications. In particular, recent theoretical and
simulation studies unify much of the diverse set of experimental resu
lts on water near proteins.