Question: control of italics in a maple plot

Hello, I am exporting a plot (numerous plots actually) directly to eps files. In my axis labels, I have Greek and non-Greek characters. I am using the following in my plot command:

The above in text format:

labels = [typeset(s), typeset(-1/'beta'-Kb)]

I want the 'beta' to be in italics. Any advice on how I can do that?

 

thanks

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