
Y011222 by MBP is a rabbit polyclonal antibody detecting 4E-BP1 (EIF4EBP1) phosphorylated at Threonine 36 (≡ Thr37 in isoform 1), the mTORC1-dependent priming phosphorylation required to initiate the hierarchical cascade releasing 4E-BP1 from eIF4E. Rapamycin-sensitive. Runs as α/β/γ phosphoforms at ~15–25 kDa. Validated for WB, IHC, ELISA. Human and mouse. Research Use Only.