Once the tRNA is charged, a ribosome can transfer the amino acid from the tRNA onto a growing peptide, according to the genetic code. Aminoacyl tRNA therefore plays an important role in DNA translation, the expression of genes to create proteins.he synthetase first binds ATP and the corresponding amino acid (or its precursor) to form an aminoacyl-adenylate, releasing inorganic pyrophosphate (PP i).
Astigmatism is a general inability of the eye to clearly focus images from any distance because of unequal curvatures of the cornea. Instead of being spherical, an astigmatic cornea has more curvature in one direction than another. It has two curvatures, similar to a football rather than a well-rounded basketball.
(redirected from lenticular astigmatism) Also found in: Dictionary, Thesaurus, Medical, Wikipedia. Related to lenticular astigmatism: corneal astigmatism. (ÉstÄ­g`mÉtÄ­z'Ém), type of faulty vision caused by a nonuniform curvature in the refractive surfacesâusually the cornea, less frequently the lensâof the eye. As a result, light rays do not all come to a single focal point on the retina. Instead, some focus on the retina while others focus in front of or behind it.