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Calculate_Isotopic_Distribution (1)

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This small workflow takes as input a peptide sequence and calculates the elemental composition of the peptide (Calculate_Elemental_Composition). This is then transferred as a numerical vector to the Rshell Calculate_Isotopic_Distribution, that calculates the (integer mass) isotopic distribution using the FFT method. To shift to approximate real masses (or m/z values), transpose the distribution with the difference between the integer and real monoisotopic masses (both easily calculated using ...

Created: 2013-03-05

Credits: Magnus Palmblad

Simulate_Mass_Spectrum (1)

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This workflow takes as input a peptide sequence and calculates the elemental composition of the peptide (Calculate_Elemental_Composition). This is then transferred as a numerical vector to the Rshell Simulate_Mass_Spectrum, that calculates the isotopic distribution using the FFT method and convolutes the theoretical (infinite resolution) distribution with a Gaussian peak shape. The building blocks can be used in any other workflows using the isotopic distribution of peptides or other molecul...

Created: 2013-03-12

Credits: Magnus Palmblad

Find isotopes with a certain exact match (1)

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This script lists all isotopes matching a certain exact mass (given a certain error) and outputs the symbol, atomic number, and exact match of the search hits.

Created: 2013-07-30 | Last updated: 2013-07-31

Credits: Egon Willighagen