PDFs and Nuclear Structure in the CJ Global Analysis

The CTEQ-JLab collaboration focuses on the global PDF analysis emphasising the impact of large-x, low Q2 deep inelsatic scattering data from Jefferson Lab (JLab). With the carefully studied nuclear effects and higher-twists effects, CJ has unique access to d and u quarks at large x out of the proton and neutron (through deuteron) structure functions. In one of the recent work, CJ teamed up with experimentalists to extract neutron F2 from the world DIS data, and re-examined the Gottfried Sum Rule as well as the non-singlet moments. This talk will present the lastest results on the neutron structure function database and applications, and also discuss potential updates from the new CJ22 parameterizations as well as the on-going study of isospin-dependent higher-twist effects.