( ( The ( Extracellular ( Signal-regulated ( Kinase Cascade ) ) ) ) ( ( is ( ( ( Required ( for ( ( NMDA ( Receptor-independent LTP ) ) ( in ( Area CA1 ) ) ) ) ) ( but not ) ) ( ( Area CA3 ) ( of ( the hippocampus ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Extracellular) (NNP Signal-regulated) (NNP Kinase) (NNP Cascade)) (VP (VBZ is) (NP (NP (NP (NNP Required)) (PP (IN for) (NP (NP (NNP NMDA) (NNP Receptor-independent) (NNP LTP)) (PP (IN in) (NP (NNP Area) (NNP CA1)))))) (CONJP (CC but) (RB not)) (NP (NP (NNP Area) (NNP CA3)) (PP (IN of) (NP (DT the) (NNS hippocampus)))))) (. .)))
The Extracellular Signal-regulated Kinase Cascade is Required for NMDA Receptor-independent LTP in Area CA1 but not Area CA3 of the hippocampus.
(ROOT (S (NP (JJ Enzymatic) (NNS cascades)) (VP (VBP help) (VP (VB amplify) (NP (NP (DT the) (NNS effects)) (PP (IN of) (NP (NN extracellular) (NNS signals)))))) (. .)))