Nicotinate nucleotide can also act as acceptor.
2.7.7.18 nicotinate-nucleotide adenyltransferase. Atkinson, M.R., Jackson, J.F. and Morton, R.K. Nicotinamide mononucleotide adenylyltransferase of pig-liver nuclei. The effects of nicotinamide mononucleotide concentration and pH on dinucleotide synthesis. Dahmen, W., Webb, B. and Preiss, J. The deamido-diphosphopyridine nucleotide and diphosphopyridine nucleotide pyrophosphorylases of Escherichia coli and yeast. Kornberg, A. and Pricer, W.E. Enzymatic cleavage of diphosphopyridine nucleotide with radioactive pyrophosphate.