phospholipid biosynthetic process glycolipid biosynthetic process lipooligosaccharide biosynthetic process beta-L-Ara4N-lipid A biosynthetic process 2013-01-14T12:53:01Z beta-L-Ara4N-lipid A formation beta-L-Ara4N-lipid A biosynthesis biological_process The chemical reactions and pathways resulting in the formation of beta-L-Ara4N-lipid A which occurs as a result of modification of the lipid A moiety of lipopolysaccharide by the addition of the sugar 4-amino-4-deoxy-L-arabinose (L-Ara4N). This strategy is adopted by pathogenic Gram-negative bacteria to evade cationic antimicrobial peptides produced by the innate immune system. pr 4-amino-4-deoxy-beta-L-arabinose-lipid A biosynthetic process beta-L-Ara4N-lipid A synthesis 4-amino-4-deoxy-beta-L-arabinose-lipid A biosynthesis beta-L-Ara4N-lipid A anabolism GO:1901760