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Campo DC | Valor | Idioma |
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dc.contributor.author | Val, Vera Maria Fonseca Almeida e | - |
dc.contributor.author | Val, Adalberto Luis | - |
dc.date.accessioned | 2020-06-15T22:09:12Z | - |
dc.date.available | 2020-06-15T22:09:12Z | - |
dc.date.issued | 1993 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/19496 | - |
dc.description.abstract | 1. 1. LDH characteristics (loci numbers, number of isozymes constituted by A and B subunits, and tissue specificity of LDH-C4) were reviewed for 245 fish species. 2. 2. The occurrence of different isozyme numbers among species of a single family (e.g. 3, 4 and 5 banded patterns), plus the existence of alleles generating 4 or 5 banded patterns in a single population indicate that the number of LDH isozymes constituted by A and B subunits might not be a character under selective pressure. 3. 3. The regulatory pattern of LDH-C* gene, i.e. its occurrence in several tissues of primitive fishes plus its highly restricted tissue distribution in advanced teleost, and even its absence in some intermediate groups (e.g. Characiformes and Siluriformes) suggest a possible selective pressure upon an ancient gene. 4. 4. Four evolutionary trends are suggested considering isozyme tissue distribution as well as LDH physiological role: (i) convergence of B to A subunit as in good anaerobes; (ii) restriction of B subunits in advanced teleost, resulting in the same pattern as in (i); (iii) non-divergence between A and B subunit as occurs in some Amazon fishes which are obligatory aerobes and (iv) the restriction of C subunit to specific tissues in advanced teleost reaching a high specialization degree, which physiological meaning is not explained yet. © 1993. | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 105, Número 1, Pags. 21-28 | pt_BR |
dc.rights | Restrito | * |
dc.subject | Lactate Dehydrogenase Isoenzyme | en |
dc.subject | Evolution | en |
dc.subject | Fish | en |
dc.subject | Nonhuman | en |
dc.subject | Priority Journal | en |
dc.subject | Review | en |
dc.subject | Characiformes | en |
dc.subject | Pisces | en |
dc.subject | Siluriformes | en |
dc.subject | Teleostei | en |
dc.title | Evolutionary trends of LDH isozymes in fishes | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1016/0305-0491(93)90164-Z | - |
dc.publisher.journal | Comparative Biochemistry and Physiology -- Part B: Biochemistry and | pt_BR |
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