ALK receptor tyrosine kinase binds to secreted growth factor midkine (MDK), homologous to pleiotrophin (PTN) (Stoica et al, 2002). MDK activates PI3K signaling (Stoica et al. 2002) and IRS1/NFKB signaling (Kuo et al, 2007) downstream of ALK.
Wellstein, A, Kuo, AH, Stoica, GE, Riegel, AT, Bowden, ET, Sale, EB, Powers, C
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