Guanosine Diphosphate

**Semantic type:** Nucleic Acid, Nucleoside, or Nucleotide

**Definition:** A purine nucleotide diphosphate comprised of a guanine and a pyrophosphate moiety bound to a ribose moiety at its 1' and 5' sites, respectively. Guanosine diphosphate (GDP) is an inactive metabolite and intermediate in the synthesis of guanosine triphosphate (GTP).

**Synonyms:** - GDP - Guanosine 5'-(Trihydrogen Diphosphate) - Guanosine Pyrophosphate