L-Alanine Prototrophic Suppressors Emerge from L-Alanine Auxotroph through Stress-Induced Mutagenesis in <i>Escherichia coli</i> oleh Harutaka Mishima, Hirokazu Watanabe, Kei Uchigasaki, So Shimoda, Shota Seki, Toshitaka Kumagai, Tomonori Nochi, Tasuke Ando, Hiroshi Yoneyama