Assertion: serine | /r/CapableOf | introduce steric repulsions
Facets:
Source sentences:
text: While alanine and serine introduce steric repulsions, the alanine side-chain adds to the rigidity of the sheet, allowing it to maintain a properly pleated structure even in a single β-sheet, and thus avoiding two alternative conformations which would interfere with the formation of the multi-layer pleated-sheet structure.