Notes: 3-keto Sphinganine (d12:0) is a short-chain analog of the typical C18 chain-length 3-keto sphinganine (d18:0) (Item No. 24380). 3-keto Sphinganine (d18:0) is a lyso-sphingolipid formed by the condensation of L-serine and palmitoyl-CoA by serine palmitoyl transferase (SPT). Vitamin K deficiency inactivates SPT resulting in a decrease in the production of 3-keto sphinganine and other sphingolipids.{12347} [Matreya, LLC. Catalog No. 1893]