jump to exam page:
I chose nonsense because I thought it'll make the enzyme shorter (since less bonds = more heat liable = can't work at 42 degrees) but yea, probably won't work even at 30 if it's an early nonsense.
A good clinically related example is HbC disease on electrophoresis. HbC disease is due to a missense mutation (glutamic acid (-) for valine (neutral)). The mutated hemoglobin is still fairly functional but when placed on gel electrophoresis the HbC migrates the least far from the negative electrode due to less negative propulsion (lack of wild type glutamic acid).
@Joanmadd Just to clarify, glutamic acid substitution for valine occurs in sickle cell disease not HbC. HbC is glutamic acid substitution for lysine :)
I was thinking this was r/t a transposon inserting itself in DNA.
submitted by ∗hayayah(1212)
Missense mutations involve a nucleotide substitution resulting in changed amino acids. Sometimes the effects of missense mutations may be only apparent under certain environmental conditions; such missense mutations are called conditional mutations. Many missense mutations result in proteins that are still functional, at least to some degree.
Also, all the other answers would probably leave you with either a greatly altered or non-functional protein.