The amino acid that produces kinks in the b pleated structure of proteins is
Proline and 4hydroxy proline confer strength to fibrous proteins like collagen,elastin,keratin etc. in their beta pleated structureRef: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 244
Glycine
Serine
Proline
Alanine
Metabolism of protein and amino acid