For decades after identifying the structure of DNA,
scientists focused only on genes, the regions of the genome that
contain codes for the production of proteins. Other regions that make up
98% of the human genome were dismissed as "junk," sequences that serve no purpose. Yet recently researchers have discovered variations and modulations in this junk DNA
that underwrite a number of intractable diseases. This knowledge has
led to innovative research and treatment approaches that may finally
control these conditions.
Junk DNA
can play vital and unanticipated roles in the control of gene
expression, from fine-tuning individual genes to switching off entire
chromosomes. Its function has forced scientists to revisit the very
meaning of the word "gene" and has engendered a bitter battle over
whether or not this genomic "nonsense" is the source of human biological
complexity. Drawing on her experience with leading investigators in
Europe and North America, Nessa Carey provides a clear and compelling
introduction to junk DNA
and its critical involvement in phenomena as diverse as genetic
diseases, viral infections, sex determination in mammals, disease
treatments, and evolution. We are only now unlocking the secrets of junk DNA,
and Carey's book is an indispensable resource for navigating the codes
and controversies of this fast-growing and hotly disputed field.
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