Summary
Human insulin is made by bacteria carrying the human gene, replacing animal sources.
In depth
In 1978 Genentech made human insulin in E. coli; the A and B chains were produced separately and joined; now proinsulin is made in yeast or E. coli. Earlier insulin came from pigs and cattle, which caused allergic reactions.
The gene is inserted into a plasmid with a strong promoter, expressed in bacteria or yeast, purified and processed. Analogues (lispro, glargine) are engineered for faster or longer action.
Remember: the human insulin gene works in bacteria because the code is universal, but bacteria cannot splice introns so cDNA is used.
Frequently asked questions
What is Insulin Production?
Human insulin is made by bacteria carrying the human gene, replacing animal sources.
Which area of biology covers Insulin Production, and how advanced is it?
Insulin Production is one of the 56 topics in Biotechnology & Genomics. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Recombinant DNA, Genetic Engineering, Vaccines by Genetic Engineering.
Can you give an example of Insulin Production?
It was the first recombinant drug approved (1982).
What should I learn before Insulin Production?
Insulin Production is a Beginner topic, so no earlier topic is required. Other Beginner topics in Biotechnology & Genomics that pair well with it include Biotechnology, Genetic Engineering, Selective Breeding.
What topics are related to Insulin Production?
The closest topics to Insulin Production are Recombinant DNA, Genetic Engineering, Vaccines by Genetic Engineering, Cellular Agriculture. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Insulin Production?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Insulin Production. To practise the whole of Biotechnology & Genomics, use the Biotechnology & Genomics quiz.
How is Insulin Production different from Recombinant DNA?
Insulin Production: Human insulin is made by bacteria carrying the human gene, replacing animal sources. Recombinant DNA: DNA made by combining sequences from different sources, typically using restriction enzymes and ligase. Read both side by side and note what each one explains.
How should I study Insulin Production step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Recombinant DNA and explain the difference aloud. Finally, take the Biotechnology & Genomics quiz and come back to this page for any question you miss.