May play an important role in inflammation and regeneration of skeletal muscle (PubMed:11415443). Essential for embryonic development (By similarity). {ECO:0000250|UniProtKB:Q9DAS1, ECO:0000269|PubMed:11415443}. [Isoform 1]: Has chemotactic response in monocytes, neutrophils and lymphocytes (PubMed:11415443). Binds CCR4 (PubMed:16137713). {ECO:0000269|PubMed:11415443, ECO:0000269|PubMed:16137713}. This is the function of Ensembl gene identifier ENSG00000217555 (CKLF, chemokine like factor).