Figure 5.
βAR activation of thermogenesis through p38 MAPK. Direct targets of p38 MAPK include peroxisome proliferator-activated receptor-gamma coactivator-1α (PGC-1α) and ATF-2. These target the genes for Pgc-1α and Ucp1. The tandem arrows between PKA and the MAPK module are not yet biochemically defined.