Phosphate Pools, Phosphate Transport, and Phosphate Availability

Abstract

(gIucose-6- phosphate ) and similar abbreviations for specific esters, P-lipid (phospholipid), P-choline (phosphatyl choline). 2 Throughout this article, solution concentrations will be given as molarities. The tissue content will usually be expressed as miIIimoles (mmoles), micromoles (I'moles) or nano­ moles (nmoles) per gram fresh weight (g fr wt); or else in terms of molarities, where the tissue is taken to be an equivalent volume of water. This should help in comparing solu­ tion and tissue concentrations and the results of different studies. I have made the neces­ sary conversions from other authors' data. Where values have been quoted in terms of dry weight alone, I have made the conversions by assuming dry wt/fresh wt ratios of 0.12, 0.14, and 0.17 for fleshy, normal, and woody tissues. They are sufficiently accurate for my comparisons. Unfortunately, authors do not always make clear the basis of their calculations. Calculations in terms of moles and molarities are free from ambiguity.