The glucose and xylose yields after 24 h hydrolysis of ammonia fiber expansion (AFEX)-treated corn stover for different xylanase loadings. LX1 to LX6 were loaded as different combinations (from single enzyme loading to five enzymes added simultaneously). Open symbol denotes that no LX3 or LX4 were included in the mixture. The left half-filled symbol denotes that LX3 was included in the mixture. The right half-filled symbol denotes LX4 was included. The closed symbol denotes both LX3 and LX4 were present in the mixture.