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Table 2 Glycine repeat frequencies in PDB helices

From: Statistical characterization of the GxxxG glycine repeats in the flagellar biosynthesis protein FliH and its Type III secretion homologue YscL

Repeat # found % of all helices
None 84,337 98.3%
GxxxG 1,373 1.6%
GxxxGxxxG 53 0.06%
GxxxGxxxGxxxG 7 0.008%
Longer GxxxG repeats 0 0.0%
  1. A total of 85,770 unique helices from 7,963 PDB proteins were searched for the presence of GxxxG repeats. The number of helices containing a repeat of each length is shown.