Biol. When you loved this informative article and you would love to receive much more information about n-acetylneuraminic acid factory generously visit our own web site. 48:443 (1970), by the search for similarity method of Pearson & Lipman, Proc. Cell. Biol. 4:1440-1448) ADH2 (Russell et al. "Conservatively modified variations" of a particular polynucleotide sequence refers to those polynucleotides that encode identical or essentially identical amino acid sequences, or where the polynucleotide does not encode an amino acid sequence, to essentially identical sequences.