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机译:Aspartic proteinase phylogeny and the origin of pregnancy-associated glycoproteins
Hughes AL, Univ S Carolina, Dept Biol Sci, Columbia, SC 29208, USA;
Aspartic proteinase; Pags; Pregnancy-associated glycoprotein; Amino-acid-sequences; X-ray analyses; Nucleotide substitution; Crystal-structures; Expressed genes; Likelihood; Resolution; Evolution; Bovine; Family;