Why can gallium ions interfere with iron-dependent processes in cells?

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A color-coded periodic table of the elements displays each element's symbol and atomic number, with categories such as alkali metals, noble gases, halogens, transition metals, and actinoid elements distinguished by different background colors. — boron group element Modern version of the periodic table of the elements (printable).

Gallium ions ( $G a^{3 +}$ ) interfere with iron-dependent processes because they closely resemble ferric iron ( $F e^{3 +}$ ) in size, charge, and coordination number.1

Because of these similarities, cells and microorganisms often mistakenly take up gallium through their standard iron-transport systems, a mechanism frequently described as a Trojan horse strategy. Once inside the cell, gallium cannot participate in the essential redox reactions that iron normally undergoes. Consequently, the presence of gallium disrupts critical metabolic pathways, including DNA synthesis and cellular respiration, which effectively inhibits the growth of bacteria and rapidly proliferating cancer cells.1