The 2193×2193 covariance matrix was then diagonalized to obtain its eigenvalues and eigenvectors. Datacards The Product Summary Sheet, or Data Card, includes details for how to use the product, as well as details of its formulation and quality controls. The X-ray structure of the pig liver enzyme has been solved in the presence and absence of a bound ubiquinone. Chem., Int. Ed., 2002, 41, 270 CrossRef CAS. (a) V. Vajpayee, Y. H. Song, T. R. Cook, H. Kim, Y. Lee, P. J. Stang and K.-W. Chi, J. Am. Chem.