Cytidylyltransferase involved in the biosynthesis of lipopolysaccharides (LPS), a necessary component and antigenic determinant of the outer membrane that has been shown to be an important factor in the host-parasite interaction in a number of Gram-negative species. Catalyzes the activation of phosphocholine (P-Cho) to CDP-choline (CDP-Cho). LicC is critical for the expression of the 6A2-specific epitope