| Title | Date | PubMed ID |
|---|---|---|
| Molecular cloning and characterization of tetrahydroprotoberberine cis-N-methyltransferase, an enzyme involved in alkaloid biosynthesis in opium poppy. | 2007 May 18 | 17389594 |
| Isolation and Characterization of S-Adenosyl-L-Methionine:Tetrahydroberberine-cis-N-Methyltransferase from Suspension Cultures of Sanguinaria canadensis L. | 1994 May | 12232209 |