SIINFEKL+Peptide+MALDI+3-19-12

Molecular Weight of SIINFEKL: 963.13 Source: http://www.sigmaaldrich.com/catalog/product/sigma/s7951?lang=en®ion=US http://www.bioinformatics.org/sms/prot_mw.html

My peptide does not seem to be very pure as these MALDI spectra show. The predominant component has a molecular weight of 985.978. There is a small peak at 963.995, but this appears to be a small fraction of the mixture.

Screenshot 1

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Matrix Background