Depletion timescale (top panel) and molecular gas fraction (bottom panel) as a function of stellar mass. The purple stars and pink diamond represent the ground-based and HST spec-z members of Hyperion respectively. The comparison sample consists of proto-cluster galaxies in the literature between z∼2−3 (Lee et al. 2017 in green-filled hexagons, Wang et al. 2018 in orange-filled squares, Gómez-Guijarro et al. 2019 in maroon open pentagons, Tadaki et al. 2019 in blue downward triangles, and Zavala et al. 2019 in dark-blue open triangles). The main-sequence depletion times and gas fractions at z∼2.45 from Scoville et al. (2017), Tacconi et al. (2018), Liu et al. (2019b) are plotted as the dotted, dashed and dot-dashed lines.