“In this paper we describe analyses performed by Real-Time Reverse-Transcriptase Polymerase Chain Reaction (real-time RT-PCR) on RNA of 12 samples, carried out for forensic purposes to investigate a correlation between tetrahydrocannabinol (THC) concentration in Cannabis and the tetrahydrocannabinol acid synthase (THCAS) gene expression. Samples were obtained from an experimental cultivation of declared potency Cannabis variety seeds and from seizures. The Rubisco gene and the 26S ribosomal RNA gene were used as internal control genes for their constant expression and stability. As results we found minor gene expression in samples from leaves of young plants. Further, grouping results for cannabis samples with similar characteristics, we have found an increased relative expression in samples with the highest percentage of THC coming from seized sample and adult plants.”
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