( ( The ( basic idea ) ) ( ( is ( to ( ( deliver ( a ribozyme ) ) ( to ( ( a cell ) ( ( in which ) ( ( an ( incorrect protein ) ) ( ( ( is ( being made ) ) and ) ( causes ( a disease ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ basic) (NN idea)) (VP (VBZ is) (S (VP (TO to) (VP (VB deliver) (NP (DT a) (NN ribozyme)) (PP (TO to) (NP (NP (DT a) (NN cell)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (DT an) (JJ incorrect) (NN protein)) (VP (VP (VBZ is) (VP (VBG being) (VP (VBN made)))) (CC and) (VP (VBZ causes) (NP (DT a) (NN disease)))))))))))) (. .)))
The basic idea  is to deliver a ribozyme to a cell in which an incorrect protein is being made and causes a disease.
(ROOT (S (NP (NP (DT The) (NN discovery)) (PP (IN of) (NP (NNS ribozymes)))) (VP (VBD nullified) (NP (DT the) (NN idea)) (SBAR (IN that) (S (NP (DT all) (JJ biological) (NNS catalysts)) (VP (VBP are) (NP (NNS proteins)))))) (. .)))