3467. PMC 330998. PMID 1694576. Peters CS, Liang X, Li S, Kannan S, Peng Y, Taub R, Diamond RH (Apr 2001). "ATF-7, a novel bZIP protein, interacts with the...

because multiple synonymous answers may fit or because the clue itself is a homonym (e.g., "Lead" as in to be ahead in a contest or "Lead" as in the element)...