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Table 2 List of proteins with altered expression in COPD patients vs the controls, as per the MALDI sequencing analysis

From: Elevated serum matrix metalloprotease (MMP-2) as a candidate biomarker for stable COPD

S. No.

Name of the identified proteins

Fold change

Predicted function

1

Preg. Zone Protein (PZP)

−3.6

Protease inhibitor, able to inhibit all four classes of proteases

2

α-2 Macroglobulin(A2MG)

−2.5

Protease inhibitor, able to inhibit all four classes of proteases

3

Peptidase Inhibitor (PI16)

−2.3

Serine Protease Inhibitor

4

Serotransferrin TRFE_Human)

−2.0

To prevent oxidative damage

5

Cytokine suppressor (SOCS-3)

3.1

SOCS-3; Suppressor of cytokine signaling. SOCS3 involved in the negative regulation of cytokines.

6

Carboxy peptidase B2,(CBPB2)

2.4

Carboxy peptidase (cleave basic amino residues), plays a major role in the breakdown of the extracellular matrix

7

Matrix Metallo

Protease −2 (MMP-II)

2.6

MMP-2 or Gelatinase A or type IV Collagenase, breakdown extracellular matrix

8

Human Leukocyte Elastase (HLE)

2.8

Serine Protease that hydrolyzes many proteins in addition to Elastin