Effect of Introducing Leucine Residues into 2‑Aminoisobutyric Acid-Based Amphiphilic Helical Peptides on Intermolecular Interactions and Peptide Self-Assembly - Kasumi Yamaguchi; Tomoichiro Kusumoto; Takeshi Araki; Yuki Gomibuchi; Takuo Yasunaga; Satoshi Osada; Junichi Taira (ACS Omega)