Upon binding to BDNF-activated NTRK2 (TRKB) receptor, autophosphorylation of FYN at tyrosine residue Y420 increases (Mizuno et al. 2003). The exact stoichiometry and involvement of other proteins is not known.
protein tyrosine kinase activity of BDNF:p-5Y-NTRK2 homodimer:MyrG-FYN-1 [plasma membrane]
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