Remember when we thought most of the human genome was "junk" DNA? Because when scientists first sequenced it, they found less than 3% of the DNA was for coding proteins, the building blocks of life. Since then, they have been discovering some surprising things about non-coding DNA. In a new study published this week, a team describes how some of it codes for a genetic snippet of "long non-coding RNA" (or lncRNA) that controls the destiny of stem cells that differentiate into various types of heart cell...
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