( ( ( RNA ( ( structure and ) RNA ) ) ( as ( catalysts ( -LRB- ( ribozymes -RRB- ) ) ) ) ) ( ( will ( be discussed ) ) . ) )
(ROOT (S (NP (NP (NNP RNA) (NN structure) (CC and) (NN RNA)) (PP (IN as) (NP (NP (NNS catalysts)) (PRN (-LRB- -LRB-) (NP (NNS ribozymes)) (-RRB- -RRB-))))) (VP (MD will) (VP (VB be) (VP (VBN discussed)))) (. .)))
RNA structure and RNA as catalysts (ribozymes) will be discussed.
(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)))))) (. .)))