With this work i am exploring the relationship between hemoglobin and chlorophyll.
 Their molecules are the same except for the presence of iron or magnesium in their centres.

I decided to show these centres with red and green buttons.

My years of collecting buttons has paid off because I found enough buttons of the right colour and shape to do the job.

The 1st buttons are sewn on.

I decide the buttons are successfully conveying the idea of the different colours produced by the different elements in the centre of each molecule…..

…so i continue sewing…
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