Table I. TMPP assignment results from the CDS database searches^a.

	Number of assigned MS/MS spectra	Number of non-redundant peptides (unique peptide sequences and modifications)	Number of N-terminus peptide signatures	Number of unique proteins with an N-terminus signature	Number of proteins with labeled TMPP peptides	% of acetylated lysines on non-redundant peptides
Tb	4183	2049	128	102	98	0%
Ta	3461	1731	113	89	65	73%
T1	10,296	3449	325	230	165	70%
T2	3529	1559	386	291	212	83%

^a Peptide information is indicated in upplementary Table S1.