Extraction and Characterization of Type I Collagen from Parrotfish (Scarus sordidus Forsskål, 1775) Scale solubilized with the Aid of Acetic Acid and Pepsin

Table 2

The prominent peak region and its description for ASC-PFS and PSC-PFS.

Peak area		Peak description	References
ASC-PFS (cm^−1)	PSC-PFS (cm^−1)
3286.67	3297.85	Amide A: N-H stretching coupled with hydrogen bond	[49]
2427.90	2926.97	Amide B: CH2 asymmetric stretching	[50]
1636.34	1636.34	Amide I: C=O stretching/H bond coupled with COO-	[51]
1541.29	1541.29	Amide II: N–H bend coupled with C-N stretching	[51]
1234.71	1235.64	Amide III: N–H bend coupled with C-H stretching	[51]

ASC-PFS: acid-soluble collagen from parrotfish scale; PSC-PFS: pepsin-soluble collagen from parrotfish scale.