R: Calculate the m/z for peptides.

mz {Peptides} | R Documentation

## Calculate the m/z for peptides.

### Description

This function calculates the (monoisotopic) mass over charge ratio (m/z) for peptides, as measured in mass spectrometry.

### Usage

    mz(seq, charge = 2, label = "none", aaShift = NULL, cysteins = 57.021464)

### Arguments

`seq` | An amino-acids sequence, in one letter code.
`charge` | The net charge for which the m/z should be calculated
`label` | Set a predefined heavy isotope label. Accepts "none", "silac_13c", "silac_13c15n" and "15n". Overwrites input in `aaShift`.
`aaShift` | Define the mass difference in Dalton of given amino acids as a named vector. Use the amino acid one letter code as names and the mass shift in Dalton as values.
`cysteins` | Define the mass shift in Dalton of blocked cysteins. Defaults to 57.021464, for cysteins blocked by iodoacetamide.

### Examples

    mz("EGVNDNECEGFFSAR")
    mz("EGVNDNECEGFFSAR", aaShift = c(K = 6.020129, R = 6.020129))
    mz("EGVNDNECEGFFSAR", label = "silac_13c", cysteins = 58.005479)

[Package Peptides version 2.4.4 Index]