( ( In ( this DNA ) ) ( , ( ( the ( basic ( building block ) ) ) ( ( consists ( of ( ( ( two nucleotides ) , ) ( each ( with ( different conformations ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT this) (NN DNA))) (, ,) (NP (DT the) (JJ basic) (NN building) (NN block)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD two) (NNS nucleotides)) (, ,) (NP (NP (DT each)) (PP (IN with) (NP (JJ different) (NNS conformations))))))) (. .)))
In this DNA, the basic building block consists of two nucleotides, each with different conformations.
(ROOT (S (NP (NNP Dna)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD two) (JJ long) (NNS chains)) (PP (IN of) (NP (NNS nucleotides)))))) (. .)))