Editing Glycoprotein (section)

==Functions==
{| class="wikitable"
|+ Some functions served by glycoproteins<ref name="Murray" />{{rp|524}}
|-
! Function
! Glycoproteins
|-
| Structural molecule
| [[Collagen]]s
|-
| Lubricant and protective agent
| [[Mucin]]s
|-
| Transport molecule
| [[Transferrin]], [[ceruloplasmin]]
|-
| Immunologic molecule
| [[Antibody|Immunoglobulins]],<ref name="immune_glycan"/> [[histocompatibility]] antigens
|-
| Hormone
| [[Human chorionic gonadotropin]] (HCG), thyroid-stimulating hormone (TSH)
|-
| Enzyme
| Various, e.g., alkaline [[phosphatase]], [[patatin]]
|-
| Cell attachment-recognition site
| Various proteins involved in cell–cell (e.g., [[sperm]]–[[oocyte]]), virus–cell, bacterium–cell, and hormone–cell interactions
|-
| [[Antifreeze protein]]
| Certain plasma proteins of coldwater fish
|-
| Interact with specific carbohydrates
| [[Lectin]]s, [[selectin]]s (cell adhesion lectins), antibodies
|-
| [[receptor (biochemistry)|Receptor]]
| Various proteins involved in hormone and drug action
|-
| Affect folding of certain proteins
| [[Calnexin]], [[calreticulin]]
|-
| Regulation of development
| [[Notch signaling|Notch]] and its analogs, key proteins in development
|-
| [[Hemostasis]] (and [[thrombosis]])
| Specific glycoproteins on the surface membranes of [[platelet]]s
|-
|}