title: High-level of cyclic AMP in the jujube plum.
abstract: A large amount of cyclic AMP-like substance was found in the imported commercial jujube plum, Zizyphi Fructus, commonly used in traditional Chinese Medicine. The fresh fruits of the jujube plum, as obtained from a local botanical garden, also contained comparable amounts of the substance. The substance was purified to an almost pure state from commercial material and was identified as cyclic AMP (adenosine-3',5'-monophosphate) by both chemical and biochemical means. Thus, it has been established that cyclic AMP content of the fruits of jujube plum reaches up to 500 nmoles/g dry weight; which is more than 10 times higher than the maximum value so far reported in other plants.
authors.affiliation: Oriental Medicine Research Centre of the Kitasato Institute, Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Hanabusa
authors.forename: J
authors.initials: J
authors.lastname: Cyong
authors.forename: M
authors.initials: M
authors.lastname: Takahashi