"p53-activating"
"Activating" is present (continuous) participle of "activate." Hyphenation creates a compound word tying the meanings of "p53" and "activating" into the equivalent of a single word phrasal unit meaning "Kevetrin activates p53."
"p53-activating"
"Activating" is present (continuous) participle of "activate." Hyphenation creates a compound word tying the meanings of "p53" and "activating" into the equivalent of a single word phrasal unit meaning "Kevetrin activates p53."