( Recently ( ( the ( polymerase ( chain reaction ) ) ) ( ( has ( allowed ( ( the amplification ) ( of ( ( any gene ) ( -LRB- ( ( in vitro ) -RRB- ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Recently)) (NP (DT the) (NN polymerase) (NN chain) (NN reaction)) (VP (VBZ has) (VP (VBN allowed) (NP (NP (DT the) (NN amplification)) (PP (IN of) (NP (NP (DT any) (NN gene)) (PRN (-LRB- -LRB-) (PP (IN in) (ADJP (NN vitro))) (-RRB- -RRB-))))))) (. .)))
Recently the polymerase chain reaction has allowed the amplification of any gene ( in vitro ).
(ROOT (S (NP (DT The) (NN polymerase) (NN chain) (NN reaction)) (VP (VBZ is) (NP (NP (DT a) (NN way)) (PP (IN of) (S (VP (VBG making) (NP (NP (NNS copies)) (PP (IN of) (NP (DT a) (NN gene))))))))) (. .)))