Complex of recombinant human CDK4, a.a. 1-303 (end), with N-Terminal GST-His-Tag, GenBank Accession No. NM_000075, and Cyclin D3, a.a 2-292(end), with N-terminal GST-tag, GenBank Accession No. NM_001760. Co-expressed in a Baculovirus-infected Sf9 cell expression system. CDK4 MW=64 kDa, Cyclin D3 MW=59 kDa.