Tailoring modification of deoxysugars during biosynthesis of the antitumor drug chromomycin A3 by Streptomyces griseus subsp. griseus - Menéndez, N; Nur-e-Alam, M; Braña, A F; Rohr, J; Salas, J A; Méndez, C (Mol Microbiol, 2004)