( ( Although ( ( the ( Rhesus ( blood ( group systems ) ) ) ) ( consists ( of ( ( ( several antigens ) , ) ( such ( as ( D ( , ( C ( , ( c ( , ( ( E and ) e ) ) ) ) ) ) ) ) ) ) ) ) ) ) ( , ( ( the ( D antigen ) ) ( ( ( is ( ( the ( most ( ( immunogenic and ) therefor ) ) ) ( most ( commonly involved ) ) ) ) ( in ( Rh incompatibility ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (DT the) (NNP Rhesus) (NN blood) (NN group) (NNS systems)) (VP (VBZ consists) (PP (IN of) (NP (NP (JJ several) (NNS antigens)) (, ,) (PP (JJ such) (IN as) (NP (NNP D) (, ,) (NNP C) (, ,) (NNP c) (, ,) (NNP E) (CC and) (NNP e)))))))) (, ,) (NP (DT the) (NNP D) (NN antigen)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ immunogenic) (CC and) (JJ therefor))) (ADJP (RBS most) (RB commonly) (VBN involved))) (PP (IN in) (NP (NNP Rh) (NN incompatibility)))) (. .)))
Although the Rhesus blood group systems consists of several antigens, such as D, C, c, E and e, the D antigen is the most immunogenic and therefor most commonly involved in Rh incompatibility.
(ROOT (S (NP (NNP Rh)) (VP (VBZ is) (NP (NP (DT the) (JJ common) (NN abbreviation)) (PP (IN for) (S (VP (VBG noting) (NP (DT the) (JJ rhesus) (NN blood) (NN type))))))) (. .)))