This chapter contains sections titled: Introduction Siderophore Classes and Properties Siderophore Production and Biosynthesis Evolutionary Aspects of Siderophores Siderophore Transporters in Saccharomyces cerevisiae SIT1 Transporter TAF1 Transporter ARN1 Transporter Transporter for Ferrichromes Transporter for Coprogens ENB1 transporter Energetics and Mechanisms FRE Reductases in Siderophore Transport Conclusions