Compare the upolarized partonic distribution functions, helicity(DSSV2009a) and transversity(Phys. Rev. D 87, 094019)

1, In the First attachment: Distribution vs. x. The upper plot is for u quark and the other one is for d quark

2, In the Second attachment: x*Distribution vs. x. The upper plot is for u quark and the other one is for d quark.

There is a difference in the distribution value between the plots I drew and the plots in the paper of Phys. Rev. D 87, 094019.  This is need to be checked further.