Temporal dynamics of amino and fatty acid composition in the razor clam Ensis siliqua (Mollusca: Bivalvia)

Baptista, Miguel; Repolho, Tiago; Maulvault, Ana Luísa; Lopes, Vanessa M.; Narciso, Luis; Marques, António; Bandarra, Narcisa; Rosa, Rui

doi:10.1007/s10152-014-0402-7

Helgoland Marine Research

Table 2 Amino acid composition (% dry weight) of Ensis siliqua, between April 2010 and February 2011

From: Temporal dynamics of amino and fatty acid composition in the razor clam Ensis siliqua (Mollusca: Bivalvia)

Amino acids	Spring	Summer		Autumn	Winter
Amino acids	April	June	August	October	December	February
Essential (EAA)
Threonine	2.54 ± 0.03^a	2.83 ± 0.19^a	2.79 ± 0.05^a	2.66 ± 0.08^a	2.64 ± 0.05^a	2.84 ± 0.10^a
Valine	2.15 ± 0.02^a	2.38 ± 0.08^b	2.30 ± 0.05^ab	2.21 ± 0.11^ab	2.13 ± 0.02^a	2.36 ± 0.05^b
Methionine	0.90 ± 0.02^a	0.97 ± 0.19^a	1.10 ± 0.06^a	1.13 ± 0.15^a	0.89 ± 0.07^a	1.04 ± 0.05^a
Isoleucine	1.94 ± 0.02^a	2.20 ± 0.09^b	2.17 ± 0.05^bc	2.08 ± 0.09^abc	1.99 ± 0.03^ac	2.20 ± 0.07^b
Leucine	3.49 ± 0.03^a	4.16 ± 0.22^b	4.08 ± 0.17^bc	3.87 ± 0.24^abc	3.64 ± 0.04^ac	4.05 ± 0.18^bc
Phenylalanine	1.85 ± 0.02^a	2.06 ± 0.08^bc	2.05 ± 0.05^abc	1.90 ± 0.11^abc	1.86 ± 0.01^ab	2.10 ± 0.07^c
Histidine	0.96 ± 0.01^abc	1.02 ± 0.03^bc	1.00 ± 0.04^abc	0.93 ± 0.04^ab	0.92 ± 0.02^a	1.04 ± 0.03^c
Lysine	3.64 ± 0.19^ab	4.21 ± 0.08^a	3.83 ± 0.36^ab	3.59 ± 0.10^b	3.46 ± 0.06^b	3.98 ± 0.26^ab
Arginine	3.71 ± 0.03^ab	4.25 ± 0.05^ab	4.54 ± 0.13^a	4.01 ± 0.32^ab	3.20 ± 0.04^b	4.09 ± 0.56^ab
∑EAA	21.19 ± 0.24^ab	24.08 ± 0.68^c	23.86 ± 1.04^c	22.39 ± 1.28^abc	20.73 ± 0.21^a	23.70 ± 1.38^bc
Non-essential (NEAA)
Aspartic acid	4.78 ± 0.06^a	5.58 ± 0.29^ab	5.78 ± 0.16^b	5.34 ± 0.32^ab	4.96 ± 0.03^ab	5.56 ± 0.27^ab
Tyrosine	1.70 ± 0.01^a	1.94 ± 0.08^b	1.94 ± 0.06^b	1.82 ± 0.11^ab	1.73 ± 0.01^a	1.96 ± 0.05^b
Serine	2.41 ± 0.01^ab	2.59 ± 0.05^a	2.50 ± 0.09^ab	2.35 ± 0.15^ab	2.31 ± 0.01^b	2.50 ± 0.08^ab
Glutamic acid	7.12 ± 0.09^a	8.58 ± 0.43^bc	8.67 ± 0.30^c	8.17 ± 0.48^abc	7.46 ± 0.09^ab	8.21 ± 0.54^abc
Glycine	5.17 ± 0.10^ab	5.87 ± 0.30^bc	6.11 ± 0.22^c	5.83 ± 0.38^bc	4.86 ± 0.03^bd	4.23 ± 0.19^d
Alanine	3.71 ± 0.06^ab	4.01 ± 0.17^b	3.57 ± 0.11^a	3.42 ± 0.13^ac	3.05 ± 0.04^c	3.34 ± 0.23^ac
Proline	1.82 ± 0.04^ab	2.02 ± 0.07^ab	1.98 ± 0.07^ab	1.77 ± 0.14^a	1.83 ± 0.05^ab	2.04 ± 0.14^b
∑NEAA	26.72 ± 0.31^a	30.59 ± 1.26^b	30.56 ± 1.00^b	28.73 ± 1.83^ab	26.21 ± 0.12^a	27.84 ± 1.63^ab
∑AA	47.91 ± 0.18^a	54.67 ± 1.83^b	54.42 ± 2.04^b	51.11 ± 3.08^ab	46.94 ± 0.31^a	51.53 ± 2.99^ab

Different superscript letters within rows represent significant differences (P < 0.05) and should be interpreted in the following exemplificative manner: a not ≠ a, a ≠ b, a ≠ c; ab ≠ cd, a not ≠ ab, ab not ≠ bc
Values are means of triplicate samples (+SD). Amino acid essentiality was defined based on Knauer and Southgate (1999)

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