( Ribosomes ( ( consist ( of ( ( proteins and ) ( ( another type ) ( of ( ( RNA ( , ( ribosomal RNA ) ) ) ( -LRB- ( rRNA -RRB- ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Ribosomes)) (VP (VBP consist) (PP (IN of) (NP (NP (NNS proteins)) (CC and) (NP (NP (DT another) (NN type)) (PP (IN of) (NP (NP (NNP RNA) (, ,) (JJ ribosomal) (NNP RNA)) (PRN (-LRB- -LRB-) (NP (NNP rRNA)) (-RRB- -RRB-)))))))) (. .)))
Ribosomes consist of proteins and another type of RNA, ribosomal RNA (rRNA).
(ROOT (S (NP (DT A) (NN ribosome)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD two) (NNS elements)) (, ,) (NP (NN rrna)) (CC and) (NP (NNS proteins))))) (. .)))
A ribosome consists of two elements, rrna and proteins.