Orthologs are genes in different species that evolved from a common ancestral gene by speciation. Normally, orthologs retain the same function in the course of evolution. Identification of orthologs is critical for reliable prediction of gene function in newly sequenced genomes. (See also Paralogs.).
A gene with similar function to a gene in an evolutionarily related species. The identification of orthologs is useful for gene function prediction.
A homolog that has retained the same function as the sequence it is compared to, but in a different species. See also homolog, paralog, COG and GeneQuiz
Genes in different species which are so similar in their nucleuotide sequences that assumed to have originated from a single ancestral gene.
a gene that encodes a protein that displays a function that is similar to a gene derived from a different species
a term defined in gene classification to refer to two genes in widely divergent organisms that have sequence similarity, and perform similar functions within the context of the organism
A homologous sequence found in different species and derived from a common ancestor.
A gene or protein from a different organism that has the same function.