Maturation of proinsulin into insulin takes place after

What is the demerit of using bovine insulin (from cow) and porcine insulin (from pig) in diabetic patients?

The first clinical gene therapy was given for treating

What is the meaning of $Bio-patents$?

Given below are two statements:
Statement $I$: $Adenosine \ deaminase$ is crucial for the immune system to function.
Statement $II$: $Adenosine \ deaminase$ deficiency can be cured only by bone marrow transplantation.
In the light of the above statements, choose the correct answer from the options given below.

$E. coli$ is useful in the production of: