Carboxymycobactin and mycobactin exchange their iron loads. This interplay between polar and nonpolar siderophore is unique to Mtb. However, mycobactin can gather iron from nonpolar regions of the host cell by itself too (Madigan et al. 2012).
Layre, E, McConnell, MJ, Rodriguez, GM, Barry CE, 3rd, Debono, CA, Moody, DB, Cheng, TY, Young, DC, Murry, JP, Matsunaga, I, Rubin, EJ, Wei, JR, Madigan, CA
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