CXCL12 and myocardial infarction: Accordingly, the present study was aimed to (a) construct a bifunctional SDF‐1‐AnxA5 fusion protein, (b) verify whether the bispecific fusion protein has the biological functions of both native SDF‐1 and AnxA5 (c) and test the protective effect of SDF‐1‐AnxA5 after mouse myocardial infarction.