Fig. 1.—

(a) Frequency of duplicate gene pairs with different NTP mutation types: None, Partial, Terminal, and Complete. In fungi, metazoans, plants, algae, and basal eukaryotes, the most common type of NTP mutation amongst duplicate gene pairs are base substitutions (None), whereas the least common were large deletions of 30 amino acids or more (Complete). Interestingly, plants have similar numbers of NTPs with terminal deletions as single base substitutions. (b) Frequency of PSR within each NTP mutation category. Proportion of relocalized duplicate pairs is highest for those pairs with complete NTP deletion/additions.