RESponses and regulation of gene expression
![Picture](/uploads/4/2/7/4/42745957/5109036.jpg?1416843482)
When a molecule attaches to a receptor site on the cell, it causes an enzyme to activate a secondary messenger to relay the signal through the cell.
The secondary messenger is able to amplify the signal through a process referred to as the phosphorylation cascade.
This process involves the removal of a phosphate group from ATP and attaching it to a protein, and this process is repeated a myriad of times (thus referred to as a cascade).
This causes the signal to amplify throughout the entire cell.
The secondary messenger is able to amplify the signal through a process referred to as the phosphorylation cascade.
This process involves the removal of a phosphate group from ATP and attaching it to a protein, and this process is repeated a myriad of times (thus referred to as a cascade).
This causes the signal to amplify throughout the entire cell.
A summary of this process is available in this animation and for further reading in more detail, click here.
Some effects of this signal transduction include gene expression, which is when an activated protein (which was brought into action by the process of signal transduction and a phosphorylation cascade) attaches to a part of DNA and begins to transcribe the gene. Gene expression results in several different processes and occurrences, such as the levels at which certain pigments are expressed in cat’s fur.