Carotenoid accumulation in the eyespot apparatus required for phototaxis is independent of chloroplast development in Euglena gracilis

Shun Tamaki, Yuri Tanno, Shota Kato, Kazunari Ozasa, Mayumi Wakazaki, Mayuko Sato, Kiminori Toyooka, Takashi Maoka, Takahiro Ishikawa, Mizuo Maeda, Tomoko Shinomura