THE UNIVERSITY OF TEXAS HEALTH SCIENCE CENTER AT HOUSTON / SCIENCE PHOTO LIBRARY THE UNIVERSITY OF TEXAS HEALTH SCIENCE CENTER AT HOUSTON / SCIENCE PHOTO LIBRARY
Real-time fluorescence microscopy of the calcium flux in beating neonatal heart cells. The calcium flux is the flow of ions into and out of the cell that controls the beating of cells. These are rat cells, tagged with the fluorescent marker fluo-3.
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