In the review “Diseases of Wnt Signaling” by Mark L. Johnson and Nalini Rajamannan, which published in Reviews in Endocrine and Metabolic Disorders 7:1/2, pp. 41–49, it was incorrectly stated that the Wnt/Ca+2 pathway involved Protein Kinase A and that a pathway involving Protein Kinase C functions in muscle myogenesis. The Wnt/Ca+2 pathway involves Protein Kinase C and the muscle myogenesis pathway involves Protein Kinase A.