Salt has a molar mass of 58.44 g/mol, glucose of 180.15 g/mol. 50 grams of glucose results in 278 millimoles of glucose. 9 g of sodium chloride correspond to 154 millimoles of sodium chloride. The osmolarity of the solution of sodium chloride, however, is 308 milliosmoles / liter.
In the natural world DNA usually becomes available by death and lysis of other cells, but in the laboratory it is provided by the researcher, often as a genetically engineered fragment or plasmid. During uptake, DNA is transported across the cell membrane(s) , and the cell wall if one is present.
In many cases, however, the number of receptor on the cell surface is to low to use chromatography. An alternative is to produce recombinant receptor protein. A plasmid cDNA library from the cells expressing the receptor is screen by transfecting the cloned cDNAs into cells that normally do not express the receptor. Cells