[′bī·ə·tən kär′bäk·sə‚lās] (biochemistry) An enzyme which condenses bicarbonate with biotin to form carboxybiotin.
biotin carboxylase
bi·o·tin car·box·yl·ase
a subunit of a number of enzymes (for example, acetyl-CoA carboxylase). It catalyzes the formation of carboxybiotin (on a biotin-carrier protein), ADP, and Pi from ATP, CO2 ,and biotin.