( ( Gastrin itself ) ( ( has ( ( no effect ) ( on ( the ( maximum ( histamine-stimulated ( gastric ( acid secretion ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Gastrin) (PRP itself)) (VP (VBZ has) (NP (NP (DT no) (NN effect)) (PP (IN on) (NP (DT the) (JJ maximum) (JJ histamine-stimulated) (JJ gastric) (NN acid) (NN secretion))))) (. .)))
Gastrin itself has no effect on the maximum histamine-stimulated gastric acid secretion.
(ROOT (S (NP (NNP Gastrin)) (VP (VBZ signals) (NP (NP (DT the) (NN secretion)) (PP (IN of) (NP (JJ gastric) (NN acid))))) (. .)))