背景介绍 BRK is a member of the non-receptor tyrosine kinases (PTKs) that contains an amino terminal SH3 and SH2 domain as well as the catalytic domain (1). BRK expression is low or undetectable in normal mammary tissue and benign lesions. However, approximately two-thirds of breast tumors express appreciable levels, and 27% of tumors over express BRK by fivefold or more (2). 产品介绍 Human BRK, also known as PTK6 (GenBank Accession No. NM_005975), 2-451 (end), with N-terminal GST-tag, MW=80 kDa, expressed in Sf9 insect cells via a baculovirus expression system.