Table 2. Antioxidant activity of PBPs and different formulations of nanoliposomes

Sample	Nanoliposome	EC₅₀ (ppm)
Sample	Nanoliposome	DPPH	ABTS
PBPs	−	234.5 ± 6.95^b	317.13 ± 7.46^b
F1	0% CH	268.33 ± 17.12^a	362.87 ± 5.80^a
F2	0.5% CH	227.6 ± 6.77^b	320.63 ± 6.80^b
F3	1% CH	193.63 ± 2.63^c	239.37 ± 11.81^c
F4	1.5% CH	81.27 ± 1.40^d	107.67 ± 6.76^d
BHT	−	34.20 ± 3.60^e	87.47 ± 2.40^e
Ascorbic acid	−	79.20 ± 0.90^d	108.03 ± 3.42^d

Values are mean ± SD of three determinations.
Small letters presented differences between treatments in each column.
DPPH, 1,1-diphenyl-2-picrylhydrazyl; ABTS, 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid; PBPs, phycobiliproteins; F1, uncoated nanoliposomes; F2, nanoliposomes coated with 0.5% CH; F3, nanoliposomes coated with 1% CH; F4, nanoliposomes coated with 1.5% CH; BHT, butylated hydroxytoluene.