Ontology highlight
ABSTRACT:
SUBMITTER: Altun A
PROVIDER: S-EPMC3158842 | biostudies-literature | 2011 Aug
REPOSITORIES: biostudies-literature
ACS chemical biology 20110614 8
Ancestors of vertebrates used ultraviolet vision. Some descendants preserved ultraviolet vision, whereas some others replaced it with violet vision, and then, some of avian lineages reinvented ultraviolet vision. Ultraviolet (absorption at ∼360 nm) and violet (410-440 nm) sensitivities of visual pigments are known to be affected by around 20 amino acid substitutions. The present quantum mechanical/molecular mechanical calculations show that these substitutions modify a H-bond network formed by t ...[more]