noun
junk DNA
Biology term for non-coding DNA sequences that do not encode proteins; once thought to be functionless, but now known to have regulatory roles.
ヒトゲノムの大部分はジャンクＤＮＡだと考えられていた。
Most of the human genome was once thought to be junk DNA.
ジャンクＤＮＡに
Even junk DNA contains regions involved in regulating gene expression.