Patent ID: 8835716

Claim:
A process for increasing the percentage weight fraction of resistant starch (RS) in corn starch comprising the steps of: a) expressing a heterologous starch synthase II from the genus Triticum in a corn plant that synthesizes a starch having an amylose content between 15% by weight and 40% by weight, wherein the amino acid sequence of the heterologous starch synthase II has an identity of at least 86% with amino acids 322 to 351 of the amino acid sequence of SEQ ID No. 2 and an identity of at least 83% with amino acids 423 to 462 of the amino acid sequence of SEQ ID No. 2 and an identity of at least 70% with amino acids 641 to 705 of the amino acid sequence of SEQ ID No. 2, and b) subsequently extracting the starch, wherein the percentage weight fraction of resistant starch (RS) is increased by at least 10% compared with corn starches from corresponding corn plants which do not express a heterologous starch synthase II.