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{{enzyme
| Name = sn-glycerol-3-phosphate 2-alpha-galactosyltransferase
| EC_number = 2.4.1.137
| CAS_number = 80747-34-8
| IUBMB_EC_number = 2/4/1/137
| GO_code = 0047221
| image = 
| width = 
| caption = 
}}
In [[enzymology]], a '''sn-glycerol-3-phosphate 2-alpha-galactosyltransferase''' ({{EC number|2.4.1.137}}) is an [[enzyme]] that [[catalysis|catalyzes]] the [[chemical reaction]]

:UDP-galactose + sn-glycerol 3-phosphate <math>\rightleftharpoons</math> UDP + 2-(alpha-D-galactosyl)-sn-glycerol 3-phosphate

Thus, the two [[substrate (biochemistry)|substrates]] of this enzyme are [[UDP-galactose]] and [[sn-glycerol 3-phosphate]], whereas its two [[product (chemistry)|products]] are [[uridine diphosphate|UDP]] and [[2-(alpha-D-galactosyl)-sn-glycerol 3-phosphate]].

This enzyme belongs to the family of [[glycosyltransferase]]s, specifically the hexosyltransferases.  The systematic name of this enzyme class is '''UDP-galactose:sn-glycerol-3-phosphate 2-alpha-D-galactosyltransferase'''. Other names in common use include '''floridoside-phosphate synthase''', '''UDP-galactose:sn-glycerol-3-phosphate-2-D-galactosyl transferase''', '''FPS''', '''UDP-galactose, sn-3-glycerol phosphate:1->2' galactosyltransferase''', '''floridoside phosphate synthetase''', and '''floridoside phosphate synthase'''.  

==References==
{{reflist|1}}
* {{cite journal | author = Gray NC, Strickland KP | date = 1982 | title = The purification and characterization of a phospholipase A2 activity from the 106,000 X g pellet (microsomal fraction) of bovine brain acting on phosphatidylinositol | journal = Can. J. Biochem.  | volume = 60 | pages = 108&ndash;17  | pmid = 7083039 | issue = 2 }}

{{enzyme-stub}}

[[Category:EC 2.4.1]]
[[Category:Enzymes of unknown structure]]