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In Real-time, Though Not in Living Color

By using single-gene integrations with green fluorescent protein, Yaron Shav-Tal and his colleagues at Bar-Ilan University were able to visualize a single gene undergoing transcription in vivo in mammalian cells, they report in Nature Methods. "In our system, the cell line has a target sequence in its genome and any sequence you send in will always go to that place," Shav-Tal tells Nature. "You can make different cell lines and not be worried about where the gene went in."

On its blog and on YouTube, The Scientist posted videos that the researchers made. This one is of a continuously transcribing single cyclin D1 gene:

The Scan

Pig Organ Transplants Considered

The Wall Street Journal reports that the US Food and Drug Administration may soon allow clinical trials that involve transplanting pig organs into humans.

'Poo-Bank' Proposal

Harvard Medical School researchers suggest people should bank stool samples when they are young to transplant when they later develop age-related diseases.

Spurred to Develop Again

New Scientist reports that researchers may have uncovered why about 60 percent of in vitro fertilization embryos stop developing.

Science Papers Examine Breast Milk Cell Populations, Cerebral Cortex Cellular Diversity, Micronesia Population History

In Science this week: unique cell populations found within breast milk, 100 transcriptionally distinct cell populations uncovered in the cerebral cortex, and more.