Слово встречается в следующем контексте:
The initial phase was sensitive to inhibition of Ca(2+) mobilization with thapsigargin, whereas the secondary phase was eliminated only by blocking transmembrane Ca(2+) influx with verapamil or inhibiting cAMP-dependent signaling with the Rp isomer of adenosine 3',5'-cyclic monophosphorothioate (Rp-cAMPS).
Заранее спасибо

http://mglinets.narod.ru/slova2/midline2.htm