| http://www.w3.org/ns/prov#value | - - Xr - Y4 - where r is an integer at least 1, each X is independently C or O, and each C can independently be substimted or unsubstimted, samrated or unsamrated, and Y4 is selected from the group consisting of a bond, O, S, NH and -N=N-; and Each of Y1, Y2, and Y3 is independently O or S, said non-nucleotide unit bound to at least one nucleotide monomeric unit by a bond or a linking group at eithe
|
