Table 1.

Mass spectrometric identification of proteins classified by neXtProt as “missing”

Protein accession	Protein name	neXtProt evidence	Chromosomal location	Experiment	Suggested reason why previously not identified
A6NJB7	Proline-rich protein 19	Transcript level	19q13.2	TAILS	Semispecific N-terminal peptide
P48169	γ-Aminobutyric acid receptor subunit α-4	Transcript level	4p12	Pre-TAILS	Cell type/tissue-specific expression
Q13520	Aquaporin-6	Transcript level	12q13.12	TAILS	Semispecific N-terminal peptide
Q5VU65	Nuclear pore membrane glycoprotein 210-like	Transcript level	1q21.3	Pre-TAILS	Semispecific N-terminal peptide
Q6PL45	BRICHOS domain-containing protein 5	Transcript level	16p13.3	TAILS	Semispecific N-terminal peptide
Q6ZTQ4	Cadherin-related family member 3	Transcript level	7q22.3	Pre-TAILS	Semispecific N-terminal peptide
Q8IWX5	Sphingosine-1-phosphate phosphatase 2	Transcript level	2q36.1	TAILS	Semispecific peptide representing C-terminal processing
Q8N309	Leucine-rich repeat-containing protein 43	Transcript level	12q24.31	Pre-TAILS	Semispecific peptide representing C-terminal processing
Q9BYX7	Putative β-actin-like protein 3	Uncertain	2q21.1	TAILS	Semispecific N-terminal peptide
P0CG22	Putative dehydrogenase/reductase SDR family member 4-like 2	Uncertain	14q11.2	Pre-TAILS	Semispecific N-terminal peptide