13C Magic angle spinning NMR analysis and quantum chemical modeling of the bathochromic shift of astaxanthin in alpha-crustacyanin, the blue carotenoprotein complex in the carapace of the lobster Homarus gammarus. - Weesie RJ; Jansen FJ; Merlin JC; Lugtenburg J; Britton G; de Groot HJ (Biochemistry, 1997)