an N-acylneuraminate + CTP <=> a CMP-N-acyl-beta-neuraminate + diphosphate
an n-acylneuraminate + ctp <=> a cmp-n-acyl-beta-neuraminate + diphosphate
an N-acylneuraminate + CTP <=> a CMP-N-acyl-beta-neuraminate + diphosphate
an n-acylneuraminate + ctp <=> a cmp-n-acyl-beta-neuraminate + diphosphate