"Holds between molecular entities A and B where A can physically interact with B and in doing so positively regulates a process that B is capable of. For example, A and B may be gene products and binding of B by A positively regulates the kinase activity of B." . _:b1214650 _:b1214649 . "molecularly increases activity of" . _:b1214649 _:b1214648 . "activates" . . . "activity directly positively regulates activity of" . _:b1214650 . _:b1214649 . _:b1214648 . _:b1214648 . "Chris Mungall" . _:b1214650 .