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. 2008 Apr 28;4:4. doi: 10.1186/1746-1448-4-4

Figure 6.

Figure 6

Halobacillus halophilus switches its osmolyte strategy from glutamine/glutamate at moderate salinities to proline at high salinities. Upon an increase of salinity of the growth medium the intracellular glutamine/glutamate pool increases. When the glutamate concentration reaches a critical concentration it effectively triggers the transcription of the pro-genes and, therefore, proline production.