an N-acylneuraminate + CMP + H(+) => a CMP-N-acyl-beta-neuraminate + H2O
an n-acylneuraminate + cmp + h(+) => a cmp-n-acyl-beta-neuraminate + h2o
an N-acylneuraminate + CMP + H(+) => a CMP-N-acyl-beta-neuraminate + H2O
an n-acylneuraminate + cmp + h(+) => a cmp-n-acyl-beta-neuraminate + h2o