2.3.1.50	ceramide biosynthesis	ceramide biosynthesis	-	-	
2.3.1.50	ceramide de novo biosynthesis	-	-	PWY3DJ-12	
2.3.1.50	Metabolic pathways	-	01100	-	
2.3.1.50	sphingolipid biosynthesis (plants)	-	-	PWY-5129	
2.3.1.50	sphingolipid biosynthesis (yeast)	-	-	SPHINGOLIPID-SYN-PWY	
2.3.1.50	Sphingolipid metabolism	-	00600	-