Le Questel, JY; Morris DG (1993). "Common ring motifs in proteins involving asparagine or glutamine groups hydrogen-bonded to main-chain atoms". Journal of Molecular Biology. 231 (3): 888–896. doi:10.1006/jmbi.1993.1335. PMID8515458.
Le Questel, JY; Morris DG (1993). "Common ring motifs in proteins involving asparagine or glutamine groups hydrogen-bonded to main-chain atoms". Journal of Molecular Biology. 231 (3): 888–896. doi:10.1006/jmbi.1993.1335. PMID8515458.