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MIT biochemist Feng Zhang is studying a set of microbial genes called TIGR. And they may be the key to developing the revolutionary gene editing tool CRISPR's successor.
But elation over the approvals was tempered by concerns the breakthrough treatments may not be accessible to many sickle cell patients, both are very expensive.
An algorithm that can analyse hundreds of millions of genetic sequences has identified DNA-cutting genes and enzymes that are extremely rare in nature.
The gene-editing technology has led to innovations in medicine, evolution and agriculture — and raised profound ethical questions about altering human DNA.
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