Bioluminescent properties of semi-synthetic aequorins containing coele
nterazine analogues possessing fluoro group(s) on the 6-(4-hydroxyphen
yl) group match the fluorescent behavior of the phenolate anions of th
e corresponding fluorinated coelenteramide analogues, indicating that
the phenolate anion of coelenteramide is the light-emitter in aequorin
bioluminescence. (C) 1998 Elsevier Science Ltd. All rights reserved.