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Putative N-glycosylation sites in RNase 1 homologs across an evolutionary spectrum. Circles indicate an asparagine residue within an N-glycosylation sequon. The neighbor-joining phylogenetic tree is adapted from ref. 30 and shows bootstrap values >30. Species in red lack an N-glycosylation sequence. The Bos taurus (cow) entry is for RNase A; bovine brain ribonuclease has a sequon at residue 62 but not residue 34.33
