carbohydrate metabolic pathway nucleotide sugar metabolic pathway KEGG:00520 PW:0000055 SMP:00010 Those metabolic reactions involved in the synthesis, utilization and/or degradation of nucleotide sugars. Nucleotide sugars are glycosyl donors usually classified depending on the type of the nucleoside forming them. Several are used in animals and many others can be found in plants and bacteria. pathway