MAPK3 and lobular neoplasia: Only 5 proteins (CSK, GNAI3, MAPK3, PTK2, and ROCK2) were highly reduced in the LN vs NC subgroup, while 7 proteins (CRK, GNAI2, MAPK3, NFKB1, RAC1, RAP1B, and ROCK1) were markedly decreased in the IgAN vs NC subgroup.