To convert from a unit shown in the left column, multiply by the factor listed in the column for the desired unit.
1 kb DNA: 333 amino acids of coding capacity = 36,000 Da
6.5 x 105 Da of double-stranded DNA (sodium salt)
3.3 x 105 Da of single-stranded DNA (sodium salt)
3.4 x 105 Da of single-stranded RNA (sodium salt)
10 kDa protein = 91 amino acids = 273 nucleotides
The atomic weights of many elements are not invariant but depend on the origin and treatment of the material. The footnotes to this table elaborate the types of variation to be expected for individual elements. The values of Ar(E) given here apply to elements as they exist naturally on earth and to certain artificial elements. When used with due regard to the footnotes they are considered reliable to ±1 in the last digit, unless otherwise stated. Values in parentheses are used for radioactive elements whose atomic weights cannot be quoted precisely without knowledge of the origin of the elements; the value given is the atomic mass number of the isotope of that element of longest known half-life.
Pure & Applied Chemistry 63, pp. 975–990 (1991); Pure & Applied Chemistry 64, pp. 1519–1534 (1992); Chemistry International 16, p. 68 (1994).