External References
http://www.sdbonline.org/fly/neural/period.htm
http://flybase.org/reports/FBgn0003068.html
Read more about this topic: Period (gene)
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“Many are poets but without the name,
For what is poesy but to create
From overfeeling good or ill; and aim
At an external life beyond our fate,
And be the new Prometheus of new men.”
—George Gordon Noel Byron (1788–1824)