Jonsy123 Posted September 19, 2005 Share Posted September 19, 2005 Can the sugar *lactose* enter the mitochondria ?, is there a symport of lactose with protons to the mitochondria ?. Link to comment Share on other sites More sharing options...
Jonsy123 Posted September 19, 2005 Author Share Posted September 19, 2005 In Prokayotes like e.coli, there is a lactose/H+ symporter in the cytoplasmatic membarane: Such a symporter, can NOT exist for the cytoplasmatic membrane of Eukaryotes, because they do not have a proton gradient between this membrane. But, theoretically this transport can happen in the mitochondrial inner membrane. Does it happen in real life ?. If it does, what would the addition of valinomycin (which will transport K+ into the mitochondrial matrix, destroying the membrane electric potential) do for this symporter ?, will it make it slower ?, faster ?, why ?. Link to comment Share on other sites More sharing options...
GradGrrl Posted October 7, 2005 Share Posted October 7, 2005 Well, since lactose is a secondary compound made of glucose and galactose, this break up occurs first via lactase, so technically lactose won't make it to the mitochondria, it will be enzymatically digested in the SI and carbohydrate metabolism will proceed in that direction. Link to comment Share on other sites More sharing options...
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