thus , a mixture composed of the four mononucleotides cyd-5'-p , ado-3'-p , guo-2 ' ( 3 ' ) -p , dthd-5'-p and of the four dinucleotides cyd-p-cyd , ado-p-ado , guo-p-urd , and urd-p-urd could be separated into eight well-resolved fractions by using a combination tris-bicarbonate/carbonate buffer system of increasing ph as an eluent .
C0005367
bicarbonate
C0007026
carbonate