Table 1.

Column names and information included in the “protein spreadsheet” file.

Column name/label (first line)	GelMap keyword (second line)	General description/commentary (third line)	Show (forth line)	Filter tree (fifth line)	GelMap interpretation (how the keyword is realized by GelMap)
ID	ID	Spot number			ID for spot identification
X	X	Coordinate on x axis			X/Y-coordinates are used to generate the spot circles on the image. Automatically scaled to
Y	Y	Coordinate on y axis			800*800 pixels
MS score	SCORE	Mascot probability score			Rank for the order of multiple hits per spot
Accession	ACC	Accession numbers according to database			Unique ID in the used database to generate an external link
Database	ACCSRC	Database for protein identification			Used to generate the base URL for the external link
Name	TITLE	Name of protein			Header of the quick info box when hovering a spot
Protein complex	Free text	Assigned mitochondrial protein complex	Show	1	Free text columns can be shown in the info box These fields have no special purpose like linking to external sites or sort algorithms. All fields are displayed in the supplemental “Protein spreadsheet”
Physiological function	Free text	Categorization by physiological function		2
Subcellular localization	Free text	Subcellular localization according to SUBA II		3
Coverage	Free text	Sequence coverage of a protein	Show
# Peptides	Free text	No. of unique peptides matching a protein hit	Show
MM (calculated)	Free text	Calculated molecular mass	Show
App mass 2D	Free text	Apparent mol. mass (second dimension)	Show
App mass 1D	Free text	Apparent mol. mass (first dimension)	Show