sequence of Grb2 DRK_DROME 24/1 A Drosophlla gene (drk) encodes a widely expressed protein with a single SH2 domain and two flanking SH3 domains, which is homologous to the Sem-5 protein of C. elegans and mammalian GRB2. CG6033 DRK Downstream of receptor kinase Drk Drk/Grb2 E(sev)2B Enhancer of sevenless-2B Grb2/drk IMR:0002969 P1112 Protein E(sev)2B Protein enhancer of sevenless 2B SH2-SH3 adapter protein drk Su(sev)R1 UniProt:Q08012 crkl downstream of receptor kinase drk l(2)10626 l(2)k13809 molecule_role