|"Human RI complexed with human angiogenin or ribonuclease I forms a dimer with human RI-angiogenin/ribonuclease I. The whole molecule of human RI consists of only LRRs; all belong to âRI- likeâ class. The two complexes are held together by many hydrogen bonds formed between the N-terminal Ã-strands of the two human RI molecules, leading to the formation of an antiparallel lÃ-sheet. The entire RI dimer adopts a right handed helix whose helical parameters are similar to those of its individual monomers. These two hRI molecules are related by an approximate two fold axis of rotation, nearly perpendicular to the common helical axis.
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Citation: Enkhbayar P, Miyashita H, Kretsinger RH, Matsushima N (2014) Helical Parameters and Correlations of Tandem Leucine Rich Repeats in Proteins. J Proteomics Bio inform 7: 139-150."