Figure 4From: Protein cleavage strategies for an improved analysis of the membrane proteomeFraction of unique peptides in the ESI mass window. The number of unique peptides is depicted in the ESI-ion trap mass window (500–6000 Da) for the fraction of unique peptides / total peptides in percent. For the calculations it was assumed that it is impossible to discriminate between leucine and isoleucine in MS/MS experiments.Back to article page