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Expression of GLK1 and GLK2 in guard cells. (A) Relative expression of GLK1 and GLK2 in guard cells displayed by Arabidopsis eFP browser (www.bar.utoronto.ca/efp/cgi-bin/efpWeb.cgi). KAT1, At5g46240, leaf guard cell marker gene; CBP, At4g33050, mesophyll cell marker gene. (B) RT-PCR analyses of GLK1 and GLK2 in guard cell protoplasts (GCP) and mesophyll cell protoplasts (MCP) from WT.
