title: Bounds on "bound water": transverse nuclear magnetic resonance relaxation in barnacle muscle.
abstract: Relatively mobile protons that do not exchange with D2O exist in barnacle muscle cells. These are not part of the nonfreezing "bound water" that does exchange. Ninety-seven percent of the muscle water exhibits a single transverse relaxation time of 35 milliseconds: one water molecule per thousand, which is briefly and irrotationally bound, will produce the observed relaxation properties.
mesh_terms: D000818:Animals; D001665:Binding Sites; D003903:Deuterium; D005615:Freezing; D009682:Magnetic Resonance Spectroscopy; D009132:Muscles / Q000378:metabolism*; D001468:Thoracica; D014867:Water / Q000378:metabolism*
chemical_list: D014867:Water; D003903:Deuterium