As for the cordycepin production by C. militaris, the liquid surface
culture [32], the submerged culture [33], and the combination
of submerged and static cultures [34] were investigated to effi-
ciently produce cordycepin.Recently, an efficientmethod to extract
cordycepin from the waste mushroom beds was proposed [35]. In
order to improve cordycepin production to a commercial level, a
novel mutant was obtained from C. militaris using high-energy proton
beam irradiation as reported in our previous study