A group of substances similar to VITAMIN K 1 which contains a ring of 2-methyl-1,4-naphthoquinione and an isoprenoid side chain of varying number of isoprene units. In vitamin K 2, each isoprene unit contains a double bond. They are produced by bacteria including the normal intestinal flora.
Synonyms: Menaquinones, Vitamin K 2, Vitamin K2, Vitamin K Quinone, 11032-49-8, Menaquinone
Instance information
comment
deficiency: coordinate VITAMIN K 2 (IM) with VITAMIN K DEFICIENCY (IM) ,2002; see VITAMIN K 1965-2001 ,2002; use VITAMIN K 1965-2001
identifier
D024482