Properties and metabolism of the aqueous cytoplasm and its boundaries

摘要: The nucleoplasm, the interiors of cytoplasmic membrane-bound organelles, and aqueous cytoplasm make up compartments animal cells. extent to which these are concentrated solutions macromolecules, metabolites, ions, other solutes is a matter some importance current thinking about cell structure function. This paper will focus on cytoplasm. It show that composition metabolic activities cytosol, obtained by methods disruption fractionation, bear almost no resemblance those in intact consequences this contemporary views function considered. A closely related topic concerns physical properties dominant component compartments, water: Are same as water solutions, or they altered result interaction with architecture? Available evidence strongly suggests at least large fraction total exhibits markedly differ from pure water. Selected examples studies be reviewed, roles discussed, notably relate metabolism ultrastructure. Although dimly perceived present, it appears living cells exhibit an organization far greater than teachings biology reveal.