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Catalytic converter theft is a growing problem in Southern California, as thieves target the emission-control devices for high-value metals such as platinum, palladium and rhodium.

Thieves target catalytic converters because they contain precious metals, including rhodium, palladium and platinum.

Thieves target catalytic converters because they contain precious metals including rhodium, palladium and platinum.

By binding the peptide to small amounts of metal such as palladium, the researchers could create a tuneable structure they could rapidly increase or decrease in size.

Catalytic converters, which control exhaust emissions, are typically found in the undercarriage of a vehicle and contain precious metals including rhodium, palladium and platinum.