Table 3. Amino acid profiles of dried skipjack tuna roe obtained by three drying methods

Amino acid		Content (g/100 g of protein)
Amino acid		I	I-HD	I-VD	I-FD	M	M-HD	M-VD	M-FD
Aspartic	ASP	6.40 ± 0.16^f	8.04 ± 0.15^d	7.81 ± 0.03^e	8.09 ± 0.04^cd	8.25 ± 0.06^ab	8.21 ± 0.04^bc	8.16 ± 0.02^bcd	8.39 ± 0.05^a
Glutamic	GLU	12.81 ± 0.08^g	13.58 ± 0.16^f	14.25 ± 0.00^c	14.42 ± 0.06^b	14.08 ± 0.04^d	13.79 ± 0.03^e	14.61 ± 0.06^a	14.49 ± 0.03^ab
Serine	SER	5.47 ± 0.03^g	5.73 ± 0.08^e	5.77 ± 0.02^e	6.09 ± 0.03^b	6.33 ± 0.02^a	5.63 ± 0.01^f	5.84 ± 0.02^d	6.01 ± 0.02^c
Histidine	HIS	2.58 ± 0.03^b	2.47 ± 0.05^d	2.34 ± 0.01^f	2.38 ± 0.03^e	2.65 ± 0.05^a	2.49 ± 0.01^cd	2.41 ± 0.02^e	2.53 ± 0.02^bc
Glycine	GLY	3.87 ± 0.01^f	4.09 ± 0.11^d	3.97 ± 0.04^e	3.82 ± 0.02^f	4.57 ± 0.02^a	4.46 ± 0.06^b	4.22 ± 0.01^c	4.07 ± 0.08^d
Threonine	THR	4.50 ± 0.03^d	4.96 ± 0.08^bc	4.89 ± 0.00^bc	4.98 ± 0.03^b	4.81 ± 0.04^c	4.82 ± 0.06^c	5.01 ± 0.01^b	5.19 ± 0.21^a
Arginine	ARG	6.61 ± 0.08^b	6.53 ± 0.07^c	6.44 ± 0.01^d	6.65 ± 0.02^b	6.59 ± 0.02^bc	6.68 ± 0.02^b	6.63 ± 0.04^b	6.92 ± 0.05^a
Alanine	ALA	5.97 ± 0.02^e	6.63 ± 0.09^d	6.73 ± 0.01^c	6.76 ± 0.03^bc	6.63 ± 0.01^d	6.81 ± 0.02^b	6.89 ± 0.00^a	6.77 ± 0.02^bc
Tyrosine	TYR	4.10 ± 0.02^c	4.06 ± 0.05^c	4.08 ± 0.01^c	4.19 ± 0.02^b	4.32 ± 0.04^a	3.88 ± 0.01^e	4.01 ± 0.03^d	4.08 ± 0.01^c
Cysteine	CYS	6.16 ± 0.29^a	4.25 ± 0.32^b	4.41 ± 0.19^b	4.37 ± 0.28^b	2.56 ± 0.06^d	3.69 ± 0.11^c	3.60 ± 0.12^c	3.68 ± 0.40^c
Valine	VAL	5.19 ± 0.02^d	5.95 ± 0.05^a	5.79 ± 0.02^b	5.40 ± 0.02^c	4.90 ± 0.03^e	5.98 ± 0.02^a	5.71 ± 0.02^b	5.73 ± 0.11^b
Methionine	MET	2.67 ± 0.03^b	2.66 ± 0.03^b	2.65 ± 0.00^b	2.68 ± 0.00^b	2.88 ± 0.04^a	2.68 ± 0.01^b	2.65 ± 0.01^b	2.67 ± 0.01^b
Tryptophan	TRP	1.47 ± 0.05'	1.08 ± 0.04^e	1.10 ± 0.00^e	0.91 ± 0.01^f	2.37 ± 0.07^a	1.66 ± 0.06^b	1.47 ± 0.03^c	1.17 ± 0.04^d
Phenylalanine	PHE	4.10 ± 0.01^e	4.44 ± 0.05^cd	4.41 ± 0.04^cd	4.36 ± 0.02^d	4.40 ± 0.06^cd	4.60 ± 0.01^a	4.53 ± 0.01^ab	4.46 ± 0.08^bc
Isoleucine	ILE	4.40 ± 0.02^f	5.12 ± 0.06^b	5.02 ± 0.01^c	4.59 ± 0.02^e	3.86 ± 0.04^g	5.25 ± 0.03^a	4.99 ± 0.01^c	4.85 ± 0.01^d
Leucine	LEU	7.37 ± 0.03^f	8.18 ± 0.07^bc	8.12 ± 0.01^c	8.06 ± 0.04^d	7.78 ± 0.03^e	8.42 ± 0.03^a	8.20 ± 0.02^b	8.24 ± 0.01^b
Lysine	LYS	6.18 ± 0.34^de	6.70 ± 0.34^bc	6.31 ± 0.24^cde	6.06 ± 0.03^d	7.38 ± 0.09^a	6.89 ± 0.22^b	6.53 ± 0.09^bcd	6.25 ± 0.29^de
Proline	PRO	10.15 ± 0.14^a	5.53 ± 1.06^b	5.91 ± 0.15^b	6.19 ± 0.03^b	5.64 ± 0.27^b	4.06 ± 0.26^c	4.54 ± 0.04^c	4.50 ± 0.20^c

Values are presented as mean ± SD (n = 3), dry weight basis.
Different lowercase letters in the same row indicate significant difference.
I, raw immature roe (yellow); M, raw mature roe (red); I-HD, immature roe dried by hot air oven; I-VD, immature roe dried by vacuum oven; I-FD, immature roe dried by freeze dryer; M-HD, mature roe dried by hot air oven; M-VD, mature roe dried by vacuum oven; M-FD, mature roe dried by freeze dryer.