Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/7EIV
Glycine--tRNA ligase alpha subunitGlycine--tRNA ligase beta subunitGLYCINEMAGNESIUM IONPHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
trna synthetaseescherichia coliheterotetramericglycyl