Figure 1.

Protein profiles constructed from the heart samples of chickens stunned with 0.75 A, 70 V (a), or 0.5 A, 40 V (c), or not stunned (0 A, 0 V) (b), respectively. Each protein spot is represented by a red cross sign on the protein map. The protein map was matched to other maps of different stunning treatments by indicating a few landmarks to ensure correct positioning of the gel maps. Landmark (L1 and L2) are predefined labels displayed on a blue background to mark spots in the gels that serve as reference points. This is for gel alignment or matching, and two annotations are considered to refer to the same point in different gels when they bear identical labels of the same category.