The protein encoded by this gene is an apolipoprotein and member of the lipocalin protein family. It is found associated with high density lipoproteins and to a lesser extent with low density lipoproteins and triglyceride-rich lipoproteins. The encoded protein is secreted through the plasma membrane but remains membrane-bound, where it is involved in lipid transport. Alternate splicing results in both coding and non-coding variants of this gene. [provided by RefSeq, Jan 2012],G3a, HSPC336, NG20, apo-M,Cancer,Cardiovascular,Cardiovascular diseases,Cardiovascular diseases_Heart disease,Endocrine & Metabolism,Heart,Lipid Metabolism,Lipids,Lipids_Lipoproteins/Apolipoproteins,Signal Transduction,APOM