NCIt definition : An analogue of the naphthoquinone vitamin K found in plants. The vitamins K are essential
for blood coagulation as it is necessary for the hepatic synthesis of the coagulation
factors II, VII, IX, and X; deficiency results in a bleeding diathesis. These vitamins
are lipo-soluble; absorption via intestinal lymphatics requires the presence of bile
salts. (NCI04);
Alternative definition : CRCH: Form of Vitamin K containing a double-bond in its single isoprenoid side chain.;