Some organism possess a monofunctional beta-amyrin synthase [3,4,6-11], other have a multifunctional enzyme that also catalyses the synthesis of alpha-amyrin (EC 126.96.36.199)  or lupeol (EC 188.8.131.52) .
construction of chimeric proteins using beta-amyrin synthase from Panax ginseng and lupeol synthase from Arabidopsis thaliana. Chimera with N-terminal half of beta-amyrin synthase and C-terminal half of lupeol synthase produces beta-amyrin and lupeol in ratio 3:1. Chimera with only the second quarter of the N-terminus from beta-amyrin synthase, produces beta-amyrin and lupeol in a 4:1 ratio, while another chimera created by mixed PCR produces beta-amyrin and lupeol in a 1:4 ratio
mutation in region responsible for product differentiation. Mutant produces 2.4% lupeol, 13.6% germanicol and 84% of dammara-18(E),21-dien-3beta-ol, dammara-18(Z),21-dien-3beta-ol and dammara-18(28),21-dien-3beta-ol
engineering of the sterol pathway in Saccharomyces cerevisiae for production of beta-amyrin. Expression of enzyme gene plus manipulation of 3-hydroxy-3-methylglutaryl-CoA reductase and lanosterol synthase in Saccharomyces cerevisiae leads to levels of 6 mg beta-amyrin per l of culture