Removal of the 4,4-dimethyl carbons in the enzymic conversion of lanosterol to cholesterol. Initial loss of the 4-alpha-methyl group.
D000818:Animals; D002247:Carbon Isotopes; D002776:Cholestanes / Q000378:metabolism*; D002784:Cholesterol / Q000096:biosynthesis*; D008099:Liver / Q000378:metabolism; D008798:Mevalonic Acid / Q000378:metabolism; D051381:Rats; D013185:Squalene / Q000096:biosynthesis; D013261:Sterols / Q000378:metabolism*; D014316:Tritium
D002247:Carbon Isotopes; D002776:Cholestanes; D013261:Sterols; D014316:Tritium; D013185:Squalene; D002784:Cholesterol; D008798:Mevalonic Acid