Recombinant Human EGFR also known as ERBB, mENA, ERBB1, and HER1 with C775S, T790M, and L858R mutations. Genbank Accession NM_005228, a.a. 668-end, with an N-terminal GST-tag, expressed in Sf9 cells via a baculovirus expression system. MW = 100 kDa.