TRIB3 protein is an inactive kinase that centrally regulates the integrated stress response (ISR) and inhibits DDIT3/CHOP transcriptional activity. It causes DDIT3/CHOP-dependent cell death during endoplasmic reticulum (ER) stress, particularly in programmed neuronal cell death. TRIB3 Protein, Human (sf9, GST) is the recombinant human-derived TRIB3 protein, expressed by Sf9 insect cells , with N-GST labeled tag.