Table 1.

FTIR spectrum peaks assignment of collagen from R. pulmo jellyfish and comparison with mammalian type I collagen extracted from human placenta and rat tail tendon.

	Peak frequencies (cm−1)
Region	R. pulmo jellyfish	Human placenta (a)	Rat tail tendon (b)	Normal range in proteins	Assignment
Amide A	3,283	Ns	3,282	3,400–3,440	N-H stretch coupled with hydrogen bond
Amide B	2,934	Ns	Ns	3,100	CH2 asymmetrical stretch
Amide I	1,647	1,659	1,632	1,600–1,700	C = O stretch/hydrogen bond coupled with COO−
Amide II	1,550	1,555	1,546	1,510–1,580	NH bend coupled with CN Stretch, CH2 bend, COO− symmetrical stretch, CH2 wag
Amide III	1,238	1,240	1,243	1,200–1,300	NH bend coupled with CN stretch, C-O stretch

Ns, not shown.

¹ Belbachir et al. (2009).

² Vidal and Mello (2011).