Initial characterization of the human central proteome

BMC Systems Biology

Table 1 Number of protein groups and distinct peptides identified in the proteomics data.

Cell line	Protein groups	With isoforms^a	Specific isoforms^b	Distinct peptides	Germ layer
HaCat	2031	2673	13	29040	Ectoderm
HEK293	4154	5412	64	71571	Mesoderm
HeLa	2379	3075	31	31609	Mesoderm
HepG2	2494	3298	24	30194	Endoderm
K562	3141	4078	37	48202	Mesoderm
Namalwa	2686	3527	29	37512	Mesoderm
U937	2073	2720	25	28786	Mesoderm

(a) Number of protein group reporters in case alternative splice variants are counted as well because they have all the peptides of the protein group, although they do not necessarily have a specific peptide detected. (b) Isoforms supported by a specific peptide.

ISSN: 1752-0509