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All RAS proteins have a fatty tail, created by an enzyme called farnesyl transferase, with which they latch on to the cancer cell membrane.

So the idea was to hobble Ras activity by finding drugs that inhibit farnesyl transferase.

Arcadia Biosciences, based in Davis, California, has taken a gene for an enzyme called alanine amino­transferase from barley and incorporated it into other crops to encourage them to absorb nitrogen before microbes do.

Antabuse may do that by blocking an enzyme called methyl transferase, or DNMT, that helps HIV go to sleep in cells, The Alfred’s Cameron said.

RAS proteins, it turns out, contain an enzyme that can create a new fatty tail if farnesyl transferase isn’t functioning.