Substance X, in turn, donates its electron to an iron-containing protein called ferredoxin.

X物质又将它的电子转移给一种含铁的蛋白质，称为铁氧还蛋白。

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Containing protein delegate food is soja and bean products.

含蛋白质的代表食物是大豆及豆制品。

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Ferritin, one of the storage forms of iron, is brown, iron-containing protein.

铁的贮存形式之一的铁蛋白，是一种棕色含铁蛋白质。

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The main phenylketonuria treatment is a strict diet with very limited intake of phenylalanine, which is mostly found in foods containing protein.

CNN: Phenylketonuria (PKU)

The dominant explanation of Alzheimer's disease contends that the massive brain cell death is due to the buildup of plaques containing a protein called beta amyloid built up in the brain.

FORBES: Hope Mixes With Doubt For Alzheimer's

Tofu is protein-rich with four ounces containing 9 grams of protein.

FORBES: The Triumph Of Tofu