| Ricin is a heterodimeric RIP |
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| l | The B (Binding) |
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| Chain, in blue,
binds |
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| galactosides
(green) |
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| » | RTB is a gene |
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| duplication
product |
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| l | The A chain
(active), |
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| in red,
depurinates |
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| adenosine
(yellow) |
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| l | RTA is a homolog
of |
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| single chain RIPs |
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