Seems it was published in Proceedings of the Japan Academy, Series B. , and the one in Science is 'a separate study'.

Found this abstract: https://www.jstage.jst.go.jp/article/pjab/98/6/98_PJA9806B-0...

Closest paper I could find is https://doi.org/10.1126/science.abn7850, but it made no mentions to amino acids in the main text or the supplement.