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Table 1 Domains in mammalian proteins classified by age

From: Emergence of novel domains in proteins

Domain age N domains Domain length
Old 20,735 (3,039) 145.8 (101)
Vertebrate 916 (363) 157.2 (102)
Mammals 79 (63) 162 (111)
  1. N domains: number of domain occurrences, in brackets different domain types (non-redundant domains). Domain length: mean and median (in brackets) values.