[Characters of amino acid substitution in LDH-A and LDH-B in the evolutionary line of vertebrates].
Structure of lactate dehydrogenase LDH-A (muscle) and LDH-B (heart) subunits is compared in the evolutionary line of vertebrates from Chondrosteous fishes to Mammals. It is revealed persistent differences between them in the amino acid set determining the physical and chemical characteristics of macromolecules. The polypeptide chain of LDH-A is shorter then that of LDH-B but it contains amino acids with higher molecular weight. In LDH-A polarized amino acids are less in number but charged amino acids are more numerous, positive charged amino acids prevail over negative charged ones. The features of polypeptide structure are discussed in connection with differences in the level of intraspecific variability of allozymes in the evolutionary line of vertebrates.
S V
SV
Mezhzherin
O P
OP
Berezovskaia
D019943:Amino Acid Substitution; D000818:Animals; D019143:Evolution, Molecular; D014644:Genetic Variation; D007527:Isoenzymes / Q000737:chemistry / Q000235:genetics*; D007770:L-Lactate Dehydrogenase / Q000737:chemistry / Q000235:genetics*; D000080864:Lactate Dehydrogenase 5; D019151:Peptide Library; D014714:Vertebrates / Q000235:genetics*
D007527:Isoenzymes; D019151:Peptide Library; D007770:L-Lactate Dehydrogenase; D000080864:Lactate Dehydrogenase 5; C409667:lactate dehydrogenase 1