( Alternatively ( , ( ( ( ( ( ( mycoplasma ( surface components ) ) ( -LRB- ( ` ( ( superantigens ' ) -RRB- ) ) ) ) ( ( may directly ) ( ( ( stimulate ( autoimmune responses ) ) , ) ( -LRB- ( 38 -RRB- ) ) ) ) ) or ) ( ( ( their ( molecular mimicry ) ) ( of ( host antigens ) ) ) ( may ( ( explain , ) ( in ( ( part , ) ( their ( ability ( to ( stimulate autoimmunity ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Alternatively)) (, ,) (S (NP (NP (NN mycoplasma) (NN surface) (NNS components)) (PRN (-LRB- -LRB-) (`` `) (NP (NNS superantigens)) ('' ') (-RRB- -RRB-))) (VP (MD may) (ADVP (RB directly)) (VP (VB stimulate) (NP (JJ autoimmune) (NNS responses)) (, ,) (PRN (-LRB- -LRB-) (NP (CD 38)) (-RRB- -RRB-))))) (CC or) (S (NP (NP (PRP$ their) (JJ molecular) (NN mimicry)) (PP (IN of) (NP (NN host) (NNS antigens)))) (VP (MD may) (VP (VB explain) (, ,) (PP (IN in) (NP (NP (NN part)) (, ,) (NP (PRP$ their) (NN ability) (S (VP (TO to) (VP (VB stimulate) (ADVP (RB autoimmunity))))))))))) (. .)))
Alternatively, mycoplasma surface components ('superantigens') may directly stimulate autoimmune responses,(38) or their molecular mimicry of host antigens may explain, in part, their ability to stimulate autoimmunity.
(ROOT (S (S (NP (NNP Autoimmunity)) (VP (MD can) (VP (VB develop) (PP (IN with) (NP (NN time)))))) (, ,) (CC and) (S (NP (PRP$ its) (NNS causes)) (VP (MD may) (VP (VB be) (VP (VBN rooted) (PP (IN in) (NP (DT this) (JJ molecular) (NN mimicry))))))) (. .)))