Table 2. Major proteins in KS-rich fractions from HTBE secretions, identified by two dimensional shotgun proteomics.

The proteins are ranked by the total number of peptides identified for each protein, with higher numbers being consistent with greater abundance.

Basis of first separation:
CsCl density gradient (pooled fractions 17–20)	MonoQ ion-exchange HPLC (pooled fractions 17–19)
Mucin-16	Mucin-16
Mucin-5B	Mucin-5B
LPLUNC1	Dermicidin
MUC4	Mucin-1
Mucin-5AC	WAP domain containing protein HE4-V2
Complement component C3	Beta-actin
Cytokeratin 9	LPLUNC1
Beta-actin	DMBT1
WAP domain containing protein HE4-V2	Cytokeratin 2
Mucin-1
Prostate stem cell antigen
PLUNC