Sun, M-S., et al. in May studied regulatory mechanisms in paclitaxel biosynthesis to help promote tissue or cell culture methods. Several hundred transcription factors, microRNAs, and phasiRNAs in Taxus chinensis were explored. Paclitaxel synthesis expression levels of enzyme genes were upregulated with the addition of jasmonate. The authors then updated regulatory networks with enzyme genes, transcription factors, microRNAs, and phasiRNAs published in .