Editing Lipoprotein (section)

===Subdivisions===
Lipoproteins, such as LDL and HDL, can be further subdivided into subspecies isolated through a variety of methods.<ref name=":3">{{cite journal | vauthors = Shah AS, Tan L, Long JL, Davidson WS | title = Proteomic diversity of high density lipoproteins: our emerging understanding of its importance in lipid transport and beyond | journal = Journal of Lipid Research | volume = 54 | issue = 10 | pages = 2575–85 | date = October 2013 | pmid = 23434634 | pmc = 3770071 | doi = 10.1194/jlr.R035725  |doi-access=free }}</ref><ref>{{cite journal | vauthors = Garcia-Rios A, Nikolic D, Perez-Martinez P, Lopez-Miranda J, Rizzo M, Hoogeveen RC | title = LDL and HDL subfractions, dysfunctional HDL: treatment options | journal = Current Pharmaceutical Design | volume = 20 | issue = 40 | pages = 6249–55 | date = 2014 | pmid = 24953394 | doi = 10.2174/1381612820666140620154014 }}</ref> These are subdivided by density or by the protein contents/ proteins they carry.<ref name=":3" /> While the research is currently ongoing, researchers are learning that different subspecies contain different apolipoproteins, proteins, and lipid contents between species which have different physiological roles.<ref name=":3" /> For example, within the HDL lipoprotein subspecies, a large number of proteins are involved in general lipid metabolism.<ref name=":3" /> However, it is being elucidated that HDL subspecies also contain proteins involved in the following functions: [[homeostasis]], [[fibrinogen]], [[Coagulation|clotting cascade]], inflammatory and immune responses, including the [[complement system]], [[proteolysis]] inhibitors, [[Acute-phase protein|acute-phase response]] proteins, and the [[Lipopolysaccharide binding protein|LPS-binding protein]], [[heme]] and iron metabolism, [[platelet]] regulation, vitamin binding and general transport.<ref name=":3" />