For Heathrow Terminal 4, follow the signs inside the terminal building for the free shuttle bus service to Heathrow Central train station, where you can get on the Heathrow Express train. The shuttle service from Terminal 4 departs every 15 minutes and is a 4 minute journey.
Definition of transcript 1 a: a written, printed, or typed copy; especially: a usually typed copy of dictated or recorded material b: an official or legal and often published copy
The piece of mRNA that results from the direct transcription of the DNA that encodes a gene is called the primary transcript and it undergoes modification, sometimes quite extensively, before it can translate its message into protein.