Our results from the deuterium order parameter analysis (Equation ) show that the hydrocarbon chain order differs for MMG-1 and MMG-6, as well as between non-interdigitated and interdigitated membrane structures. The interdigitated systems display overall higher, but comparable, order parameter values for both MMG analogs (Figures ). The higher order parameters measured for the interdigitated membranes match the previous observation in which glycerol-induced interdigitated dipalmitoylphosphatidylcholine (DPPC) bilayers were observed to display a higher extent of acyl chain ordering in comparison to that of the non-interdigitated phase. The non-interdigitated systems have notable differences in the order parameters between the analogs; in particular, the MMG-6 tails are more fluid in these systems (Figures ).