Human Potassium Channel Tetramerization Domain Containing 13 (KCTD13) protein, also known as BTB/POZ domain-containing adapter for CUL3- mediated RhoA degradation protein 1 (BACURD1), GenBank Accession No. NM_178863, a.a. 2-329(end) with N-terminal GST-tag, MW = 63 kDa, expressed in a baculovirus-infected Sf9 cell expression system.