Question

Protein found in eye lens is
A. Crystalline
B. Collagen
C. Opsin
D. Rhodopsin

Answer 1

Hint: The lens is located in the eye. By changing its shape, the lens changes the focal distance of the eye. As such, it focuses the light beams that go through it (and onto the retina) so as to create a clear image of objects that are situated at different distances.

Complete Answer:
Crystallin is a water-soluble structural protein found in the focal point and the cornea of the eye representing the transparency of the structure. It has been distinguished in different places, for example, the heart, and in breast cancer tumors. Since it has been indicated that focal lens injury may advance nerve recovery, crystallin has been a zone of neural research.

Up until now, it has been shown that crystallin β b2 (crybb2) might be a neurite-promoting component. The primary function of crystallins in the lens of the eye is most likely to build the refractive file while not deterring light. However, this is not their only function. It has become evident that crystallins may have a few metabolic and regular functions, both inside the lens and in different parts of the body.

Crystallins from a vertebrate eye focal point are arranged into three fundamental sorts: alpha, beta and gamma crystallins. These distinctions depend on the request where they elute from a gel filtration chromatography column. These are also called universal crystallins. Beta-and gamma-crystallins, (for example, CRYGC) are comparable in sequence, structure and domain topology and hence have been grouped as a protein superfamily called βγ-Crystallins.

The α-crystallin family and βγ-crystallins make the significant family out of proteins present in the crystalline lens. They happen in every vertebrate class (however gamma-crystallins are low or missing in avian focal points); and delta-crystallin is found only in reptiles and birds.

Hence the correct answer is option A.

Note: There are other taxon-explicit crystallins which are just found in the lens of certain living organisms; these include delta, epsilon, tau, and iota- crystallins. For instance, alpha, beta, and delta crystallins are found in avian and reptilian lenses, and the alpha, beta, and gamma families are found in the lens of every single other vertebrate.