we now show that deoxyribonucleosides , but not ribonucleosides , induce the aldolase specific for deoxyribose-5-p ( 2-deoxy-d-ribose-5-phosphate acetaldehyde lyase , ec 4.1.2.4 ) , thus allowing the sugar moiety of exogenous deoxyribonucleosides to be utilized as an energy source .
C0016762
aldolase
C0024188
lyase