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Front (left) and back (right) views of the (A) human (dataset available from https://sparc.science/datasets/100), (B) pig (dataset available from https://sparc.science/datasets/102), and (C) rat (dataset available from https://sparc.science/datasets/99) scaffolds (not to scale). The topology of the scaffold is different for each species as each has a different number of pulmonary veins entering the left atrium (4, 2, and 3, respectively).
