INTERACTIVE PATHWAY · FOLLOW THE INSTRUCTIONS
From DNA to protein
Follow one gene from the nucleus to a working protein. Take it one step at a time, then try reading a tiny RNA message.
FOLLOW THE MESSAGE
Six stops from gene to protein
Copy a message from one gene, read it, then make a chain of amino acids.
THE BIG PICTURE · TAP ANY STOP
Follow a gene’s message
Choose a stop to update the lesson below, or follow the story in order.
Step 1 of 6: Choose a gene.
Choose a gene
Use one part of DNA as instructions.
A gene is a stretch of DNA. To make its protein, the cell uses the gene as a pattern. This step does not copy the whole genome or divide the cell.
See where each part happens
One gene is transcribed into RNA. RNA is prepared before export.
The final message moves to the cytoplasm.
A ribosome reads codons; the chain begins to fold.
TRY THE TINY EXAMPLE
Read an RNA word
Each group of three RNA letters is a codon. Pick one below to see its meaning.
Invented teaching sequence: these letters are not a human gene or anyone’s genetic result.
Watch the reader move one word at a time. This is a teaching pace, not the speed of a real ribosome.
Start · Met
AUG is the start signal in this small example. It also specifies methionine.
What if one DNA letter changes?
In this one example, TTT becoming TCT changes RNA UUU to UCU, so the chain changes from Phe to Ser at that spot. Some changes have no effect; others matter. This example cannot predict anyone’s health.
