Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/1HOP 1HOP: STRUCTURE OF GUANINE NUCLEOTIDE (GPPCP) COMPLEX OF ADENYLOSUCCINATE SYNTHETASE FROM... ADENYLOSUCCINATE SYNTHETASEPHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER structure guanine nucleotide complex synthetase