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FiberStructural carbohydrates incorn wet milled feeds are highin hemicellulose, moderate tolow in cellulose and low inlignin. Steeping corn in diluteacid increases the susceptibilityof hemicellulose to microbialattack. Corn celluloseswells during the steepingprocess and is also quite vulnerableto cellulolytic bacteria,especially when fed in thewet form as with wet corngluten feed. The primary fibercomponent measured by thecrude fiber assay is cellulose.Consequently, these datashow (Table 2) that celluloseis very low in gluten meal andabsent from corn steep liquor.FatsFats are the most concentratedform of metabolizableenergy available to the feedindustry. Corn steep liquoris the only wet milledfeedstuff that does not containan appreciable amountof fat (Table 2). The unsaturatednature of these fats mayenhance utilization of saturatedfats in other feedstuffsby poultry 59 . In ruminants,unsaturated fatty acids arehydrogenated by ruminalmicroflora. This tends toincrease the metabolizableenergy available to ruminantsby removing hydrogenfrom the rumen, resulting inless methane production.The essential fatty acids,linoleic, linolenic andarachidonic are required inall diets. Corn wet milledfeeds, with the exception ofcorn steep liquor, containcorn oil which is high inlinoleic acid. This is especiallyimportant to poultry,which have a high requirementfor linoleic acid.Table 3.Nutrient Composition of Corn Wet Milled FeedsUnit Corn Gluten Corn Gluten Corn Germ Corn SteepFeed Meal Meal LiquorDry Matter % 90 90 90 50RuminantsTDN % 80 75 67 40Net EnergyGain mcal/lb .60 .60 .44 -Maintenance mcal/lb .80 .85 .70 -Lactation mcal/lb .77 .80 .69 -Metabolizable EnergySwine kcal/lb 1130 1600 1360 920Chicks kcal/lb 830 1760 770 725Hens kcal/lb 830 1760 770 725Turkeys kcal/lb 830 1760 770 72521