Receptor specificity of S. aureus phages. (A) Siphoviruses Φ11, Φ80, Φ52A, Φ47, and Φ77 and podovirus SA24-1 recognize α-or β-1,4-GlcNAc-RboP WTA. β-1,3-GlcNAc-WTA is adsorbed to less strongly by Φ80, Φ52A, and Φ11. (B) Podoviruses ΦP68, Φ44AHJD, and Φ66 bind to β-1,4-GlcNAc-RboP WTA and are blocked by β-1,3-GlcNAc or α-1,4-GlcNAc modifications. (C) Siphovirus Φ187 binds to α-GalNAC-GroP. (D) Myovirus ΦK, Φ812, attache to the backbone of GroP and/or RboP. (E) ΦSA012 recognizes both the RboP WTA backbone and α-1,4-GlcNAc-RboP by two different RBPs.