FUNCTIONAL GROUP COMPOSITIONS OF MACROMOLECULAR ORGANIC GRAINS IN (162173) RYUGU IN RELATION TO CARBONACEOUS CHONDRITES. - De Gregorio, B. T.; Cody, G. D.; Stroud, R. M.; Kilcoyne, A. L. D.; Sandford, S.; Nittler, L. R.; Barosch, J.; Yabuta, H.; Kebukawa, Y.; Okumura, T.; Hashiguchi, M.; Yamashita, S.; et al. (Meteoritics & Planetary Science, 2022)