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>Calicheamicins, a novel family of antitumor antibiotics. 3. Isolation, purification and characterization of calicheamicins .BETA.1Br, .GAMMA.1Br, .ALPHA.2I, .ALPHA.3I, .BETA.1I, .GAMMA.1I and .DELTA.1I.
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Calicheamicins, a novel family of antitumor antibiotics. 3. Isolation, purification and characterization of calicheamicins .BETA.1Br, .GAMMA.1Br, .ALPHA.2I, .ALPHA.3I, .BETA.1I, .GAMMA.1I and .DELTA.1I.