Gap junction α-1 protein is indispensable for normal heart function under normal conditions. This doping can assist in the propagation of mediated electrical impulses and stimulate the synchronized contraction of heart tissue (through electrical syncytia) . At the same time, the tissue junction point α-1 protein is a special transmembrane domain that allows small molecules to include second messengers (such as c-AMP, inositol triphosphate). GAP 26 is a fragment composed of 13 amino acids in series. The typical sequence in the peptide synthesis of has a relatively stable spatial structure.