from The Century Dictionary.
- noun An albuminoid substance contained in the crystalline lens of the eye: same as
- noun In chem., an old name for aniline.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Physiol. Chem.) See
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry A
globulinfound in the lensof the eye
Sorry, no etymologies found.
If ID has a better mechanism for the occurrence of the taxon specific crystallins and the implications of their distributions i.e. bird/reptile LDHB crystallin, then I would like to hear it.
ALDH is the most abundant crystallin in elephant shrews and some rodents.
Many taxon specific crystallins are encoded in a single gene which produce both an enzyme and the lens crystallin.
The Zeta crystallin, quinone reductase, found in some mammals is transcribed from a lens specific promoter not present in other mammals.
We believe that greater consideration should be given to the possibility that enzyme/crystallin recruitment is, in general, an adaptive process and that enzyme/crystallins may provide specific benefits to the lens.
Duck lens e-crystallin and lactate dehydrogenase B4 are identical: A single-copy gene product with two distinct functions
I would like to point out that the bird/reptile relationship extends to alpha and beta chains of alpha crystallin and rhodopsin.
While there may have been selective advantages for the recruitment of ALDH1/h-crystallin in lens, there is no clear advantage to its collateral recruitment as the major ALDH1 expressed in other parts of the eye
While the molecular mechanism of enzyme/ crystallin recruitment may vary, the fact that the large majority of recruited proteins bind pyridine nucleotides may be of paramount importance.
LDH B is another taxon specific crystallin that is found only in reptiles and birds and also exists as a single copy gene.