( ( CD81 ( IN ( T-CELL ( DEVELOPMENT ( AND ( FUNCTION CD81 ) ) ) ) ) ) ( ( is ( ( a ( ( recently described ) member ) ) ( of ( ( the ( four transmembrane ) ) ( spanning ( family ( of ( membrane proteins ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP CD81)) (PP (IN IN) (NP (NNP T-CELL) (NNP DEVELOPMENT) (CC AND) (NNP FUNCTION) (NNP CD81)))) (VP (VBZ is) (NP (NP (DT a) (ADJP (RB recently) (JJ described)) (NN member)) (PP (IN of) (NP (NP (DT the) (CD four) (NN transmembrane)) (VP (VBG spanning) (NP (NP (NN family)) (PP (IN of) (NP (JJ membrane) (NNS proteins))))))))) (. .)))
CD81 IN T-CELL DEVELOPMENT AND FUNCTION CD81 is a recently described member of the four transmembrane spanning family of membrane proteins.
(ROOT (S (NP (JJ Transmembrane) (NNS proteins)) (VP (VBP span) (NP (DT the) (JJ entire) (NN plasma) (NN membrane))) (. .)))