The CDK6ic complex is an important serine/threonine protein kinase that regulates cell cycle progression and differentiation, promoting the G1/S transition by phosphorylating substrates such as pRB/RB1 and NPM1. It interacts with D-type G1 cyclins during interphase to form active pRB/RB1 kinase, which controls cell cycle entry. CDK6-CCND1 Heterodimer Protein, Human (sf9, GST, Flag, His) is the recombinant human-derived CDK6-CCND1 Heterodimer, expressed by Sf9 insect cells, with N-Flag, N-His, N-GST labeled tag.