  We present the frequency- and temperature-dependent dielectric properties of
lysozyme solutions in a broad concentration regime, measured at subzero
temperatures and compare the results with measurements above the freezing point
of water and on hydrated lysozyme powder. Our experiments allow examining the
dynamics of unfreezable hydration water in a broad temperature range including
the so-called No Man's Land (160 - 235 K). The obtained results prove the
bimodality of the hydration shell dynamics and are discussed in the context of
the highly-debated fragile-to-strong transition of water.
