Fig. 2. (a) Average preprocessed Raman spectra collected from collagen (n = 8, orange), soft gelMA (n = 5, pink) and stiff gelMA (n = 5, magenta) hydrogels at regions devoid of CHO-T cells. (b) Average preprocessed spectra from CHO-T cells within collagen (n = 45), soft gelMA (n = 62), and stiff gelMA (n = 61). In (a) and (b), black lines represent the standard deviation from the average spectra and features highlighted in gray are associated with denatured and partially hydrolyzed collagen in the hydrogel.
