Corrections: In the June 7, 2006 issue's “This Week in the Journal” summary of the Cellular/Molecular article by Nickel et al., the first sentence should have read “In the mammalian inner ear, connexin 26 (Cx26) and Cx30 form heteromeric gap junctions.” As kindly pointed out by Regina Nickel, mammalian Cx30 is expressed in several tissue included the inner ear whereas chicken Cx30 (cCx30) is inner-ear specific.