| Title | Date | PubMed ID |
|---|---|---|
| gamma-Glutamylputrescine synthetase in the putrescine utilization pathway of Escherichia coli K-12. | 2008 Jul 18 | 18495664 |
| A novel putrescine utilization pathway involves gamma-glutamylated intermediates of Escherichia coli K-12. | 2005 Feb 11 | 15590624 |