A. Yokoyama et al., PRODUCTION OF ASTAXANTHIN AND 4-KETOZEAXANTHIN BY THE MARINE BACTERIUM, AGROBACTERIUM-AURANTIACUM, Bioscience, biotechnology, and biochemistry, 58(10), 1994, pp. 1842-1844
In attempts to find new sources of astaxanthin, approximately 200 stra
ins of marine bacteria were collected from the sea near Okinawa Island
s for screening. Silica gel TLC, VIS, EIMS, H-1-NMR, CD, and optical r
esolution HPLC data indicated that one of the strains, Agrobacterium a
urantiacum, produced (3S,3'S)-astaxanthin and (3S,3'R)-4-ketozeaxanthi
n.