( ( ( This ( latter class ) ) ( of proteins ) ) ( , ( ( called ( ( enzymes , ) ( functions ( as ( biological catalysts ) ) ) ) ) . ) ) )
(ROOT (SINV (FRAG (NP (NP (DT This) (JJ latter) (NN class)) (PP (IN of) (NP (NNS proteins))))) (, ,) (VP (VBD called)) (NP (NP (NNS enzymes)) (, ,) (NP (NP (NNS functions)) (PP (IN as) (NP (JJ biological) (NNS catalysts))))) (. .)))
This latter class of proteins, called enzymes, functions as biological catalysts.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (NNS catalysts)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN found) (ADVP (RB inside)) (PP (IN of) (S (VP (VBG living) (NP (NNS things) (NNS enzymes))))))))))) (. .)))