1.3.1.27	2-hexadecenal reductase	sphingosine metabolism	sphingosine metabolism	-	
2.7.1.91	sphingosine kinase	sphingosine metabolism	sphingosine metabolism	-	
3.1.3.4	phosphatidate phosphatase	sphingosine metabolism	sphingosine metabolism	-	
3.5.1.23	ceramidase	sphingosine metabolism	sphingosine metabolism	-	
4.1.2.27	sphinganine-1-phosphate aldolase	sphingosine metabolism	sphingosine metabolism	-