Fig. 6From: The calcified eggshell matrix proteome of a songbird, the zebra finch (Taeniopygia guttata)Ovoinhibitor phosphopeptide spectrum. This doubly charged peptide was measured with a mass error of 3.23Â ppm and a PEP of 0.002. Y-ions are shown in red, b-ions in blue, and fragments with neutral loss of ammonia or water are in orange. Asterisks indicate loss of the phospho groupBack to article page