marker

Depending on chemical markers placed on these histones, the chromatin can be wound tightly -- preventing transcription factors from binding -- or loosely, making it accessible for generating mRNA copies.

Campaign group the Molly Rose Foundation welcomed what it called an "important marker for Ofcom to be bolder" but said that should not obscure the fact that the OSA needed to be strengthened.

After Trump’s victory, McCoy joked from the pulpit: “This week, Charlie’s going back to Washington to meet with the president because he’s going to call in his markers.”

Historians say the colonial administrators put down any rebellions and often burnt Naga villages to subdue them, in the process erasing much of their important cultural markers such as paintings, engravings and artefacts.

Epigenetics is the part of genetics that's based not on the sequence of genetic building blocks but on small yet characteristic chemical markers on these building blocks.