Words similar to hexokinases
Example sentences for: hexokinases
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This hypothesis is based on findings that only those glucose analogs that are believed to be substrates for phosphorylation by hexokinases are effective in repressing alpha-amylase expression [ 37 ] . However, the role of hexokinases in sugar responses remains under debate [ 38 39 40 ] .
First, the extent to which mannose and 3- O -methylglucose are metabolized by hexokinases and other enzymes has yet to be determined for Arabidopsis.
3- O -methylglucose is a glucose analog that, in at least some organisms, is transported by hexose transporters [ 61 62 63 64 ] but is phosphorylated very inefficiently, if at all, by hexokinases [ 62 ] . Seedlings grown on media containing 3- O -methylglucose have 20:1 levels that are similar to the 20:1 levels of plants grown on approximately equi-molar concentrations of sorbitol, but that are much lower than the 20:1 levels of plants grown on equi-molar concentrations of glucose (Figure 2).
In many organisms, mannose has been shown to be a substrate for hexokinases whereas 3- O -methylglucose is metabolized poorly, if at all, by hexokinases [ 62 65 ] . As a result, processes that are affected by mannose but not by 3- O -methylglucose have been postulated to be regulated via a hexokinase-mediated pathway(s) [ 19 31 32 ] . By this logic, the fact that seed storage lipid breakdown is repressed by the presence of mannose but not by 3- O -methylglucose could also be interpreted to mean that inhibition of seed storage lipid breakdown occurs via a hexokinase-mediated pathway.
Proteins postulated to act in control of at least some sugar-regulated processes include hexokinases [ 31 32 33 34 ] and SNF1-related protein kinases [ 35 36 ] . Hexokinases have been suggested to play a role in sugar repression of alpha-amylase activity.
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