( It ( ( is ( sensitive ( to ( ( ( ( high concentrations ) ( of ( urea ( in ( the ( external water ) ) ) ) ) ) ( as ( well as ) ) ) ( ( high concentrations ) ( of ( ( ( ( ( ( thiourea , ) ( a ( urea analogue ) ) ) , ) ( which ( causes ( ( a decrease ) ( of ( urea influx ) ) ) ) ) ) , ) ( consistent ( with ( ( the hypothesis ) ( of ( a ( bi-directional ( transporter ( -LRB- ( Wood ( et al. ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (ADJP (JJ sensitive) (PP (TO to) (NP (NP (NP (JJ high) (NNS concentrations)) (PP (IN of) (NP (NP (NN urea)) (PP (IN in) (NP (DT the) (JJ external) (NN water)))))) (CONJP (RB as) (RB well) (IN as)) (NP (NP (JJ high) (NNS concentrations)) (PP (IN of) (NP (NP (NP (NN thiourea)) (, ,) (NP (DT a) (NN urea) (NN analogue)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ causes) (NP (NP (DT a) (NN decrease)) (PP (IN of) (NP (NN urea) (NN influx))))))) (, ,)) (ADJP (JJ consistent) (PP (IN with) (NP (NP (DT the) (NNS hypothesis)) (PP (IN of) (NP (DT a) (JJ bi-directional) (CD transporter) (-LRB- -LRB-) (NNP Wood) (FW et) (NN al.))))))))))))) (. .)))
It is sensitive to high concentrations of urea in the external water as well as high concentrations of thiourea, a urea analogue, which causes a decrease of urea influx, consistent with the hypothesis of a bi-directional transporter (Wood et al.
(ROOT (S (NP (NNS Animals)) (VP (MD can) (VP (VP (VB transport) (NP (NP (DT the) (NN waste) (NN material)) (VP (VBN known) (PP (IN as) (NP (NP (NN urea)) (PP (IN in) (NP (DT the) (JJ circulatory) (NN system)))))))) (CC and) (VP (VB store) (NP (PRP it)) (ADVP (RB safely)) (PP (IN at) (NP (JJ high) (NNS concentrations)))))) (. .)))