There are at least 32 known peroxisomal proteins, called peroxins, which participate in the process of peroxisome assembly.

Furthermore, IL-17 bears no resemblance to any other known proteins or structural domains.

Hemopexin binds heme with the highest affinity of any known protein.

The amount of known protein can be adjusted to optimize the sensitivity of the assay.

It is the only known protein with such a stability profile.

Among the most known globular proteins is hemoglobin, a member of the globin protein family.

Most biotechnology works the other way, sequencing the genes responsible for expression of known proteins.

PDZ domains are found in many thousands of known proteins.

It is one of the few known vanadium-containing proteins.

Antibody-producing cells could be harvested easily from the spleens of mice that had been exposed to a known protein.