( ( In humans ) ( , ( it ( ( is ( ( found ( in abundance ) ) ( in ( ( ( ( ( tears , ) ( saliva leukocytes ) ) , ) and ) serum ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NNS humans))) (, ,) (NP (PRP it)) (VP (VBZ is) (VP (VBN found) (PP (IN in) (NP (NN abundance))) (PP (IN in) (NP (NP (NNS tears)) (, ,) (NP (NN saliva) (NNS leukocytes)) (, ,) (CC and) (NP (NN serum)))))) (. .)))
In humans, it is found in abundance in tears, saliva leukocytes, and serum.
(ROOT (S (NP (NNP Human) (NNP lysozyme)) (VP (VBZ is) (NP (NP (DT an) (JJ antibacterial) (NN protein)) (VP (VBN found) (PP (IN in) (NP (NNS tears) (CC and) (NN saliva)))))) (. .)))