How many Amino Acids is in the protein insulin?

In most species, there are 51. There are different varieties of insulin. See

http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/pancreas/insulin_struct.html

Thank you

To find out how many amino acids are in the protein insulin, we can refer to scientific databases or resources that provide information on protein sequences. One such database is the UniProt database.

Here's how you can find the answer using the UniProt database:

1. Go to the UniProt database website (https://www.uniprot.org/).
2. In the search bar at the top of the page, type "insulin" and hit Enter.
3. On the search results page, click on the entry that corresponds to the specific insulin you are interested in. For example, if you are looking for human insulin, click on the entry labeled "Insulin - Homo sapiens (Human)".
4. This will take you to the protein's entry page. Scroll down to the section titled "Sequence" or "Protein sequence".
5. Look for the line that mentions the length of the protein sequence. It should indicate the number of amino acids in the protein.

Note: The exact location of the information may vary depending on the database or resource you are using, but most protein databases provide similar information.

Insulin is a peptide hormone composed of two chains, the A chain and B chain, which are linked together by disulfide bonds. In humans, the A chain contains 21 amino acids, and the B chain contains 30 amino acids. So, the total number of amino acids in human insulin is 51 (21 + 30).