SOCS-3 inhibits IL-12-induced STAT4 activation by binding through its SH2 domain to the STAT4 docking site in the IL-12 receptor beta2 subunit.
Yamamoto K, Yamaguchi M, Miyasaka N, Miura O, Biochem Biophys Res Commun, 2003 Oct 31 - link

Erythropoietin induces tyrosine phosphorylation of the interleukin-3 receptor beta subunit (betaIL3) and recruitment of Stat5 to possible Stat5-docking sites in betaIL3.
Chin H, Wakao H, Miyajima A, Kamiyama R, Miyasaka N, Miura O, Blood, 1997 Jun 15 - link