▁Belg ium . ▁The ▁song ▁reached ▁nr . ▁ 1 ▁in ▁the ▁Netherlands ▁and ▁in ▁Belg ium ▁nr . ▁ 2 . ▁ ▁Music ▁video ▁The ▁video ▁shows ▁the ▁girls ▁dance ▁in ▁very ▁color ful ▁out f its ▁in ▁a ▁kind ▁of ▁Africa ▁v ibe . ▁ ▁Ch arts ▁ ▁Week ly ▁charts ▁ ▁Year - end ▁charts ▁ ▁References ▁ 1 ▁▁ 2 . ▁ ▁Category : 2 0 0 9 ▁singles ▁Category : 2 0 0 9 ▁songs <0x0A> </s> ▁Gl ut am ine ▁synth et ase ▁( GS ) ▁() ▁is ▁an ▁en zym e ▁that ▁plays ▁an ▁essential ▁role ▁in ▁the ▁met abol ism ▁of ▁nit ro gen ▁by ▁catal yz ing ▁the ▁cond ens ation ▁of ▁gl ut am ate ▁and ▁am mon ia ▁to ▁form ▁gl ut am ine : ▁ ▁Gl ut am ate ▁+ ▁ATP ▁+ ▁N H 3 ▁→ ▁Gl ut am ine ▁+ ▁AD P ▁+ ▁ph osph ate ▁▁ ▁Gl ut am ine ▁synth et ase ▁uses ▁am mon ia ▁produced ▁by ▁nit rate ▁reduction , ▁am ino ▁acid ▁de grad ation , ▁and ▁phot ores p iration . ▁The ▁am ide ▁group ▁of ▁gl ut am ate ▁is ▁a ▁nit ro gen ▁source ▁for ▁the ▁synth esis ▁of ▁gl ut am ine ▁path way ▁met abol ites . ▁ ▁Other ▁re actions ▁may ▁take ▁place ▁via ▁G S . ▁Compet ition ▁between ▁am mon ium ▁ion ▁and ▁water , ▁their ▁binding ▁aff in ities , ▁and ▁the ▁concentration ▁of ▁am mon