Characteristics of the Aragonitic Layer in Adult Oyster Shells, Crassostrea gigas: Structural Study of Myostracum including the Adductor Muscle Scar

Table 1

Amino acid compositions of the soluble and insoluble proteins from Crassostrea virginica [26] and Crassostrea gigas [17] (Asx: Asp + Asn, Glx: Glu + Gln).

Species	Layer	Asx	Thr	Ser	Glx	Pro	Gly	Ala	Val	Tyr
C. virginica	Folia	29.4	0.8	22.0	5.2	3.5	33.4	1.42	1.2	0
	Whole shell, insoluble only	18.1	1.2	14.2	3.5	6.2	34.1	4.7	3.0	4.9
C. gigas	Folia	24.8	1.9	6.6	4.2	5.5	29.3	10.3	3.0	2.2
	Whole shell, insoluble only	8.7	2.8	5.8	6.3	6.9	27.4	12.4	5.6	2.0
	Myostracum in AMS	20.9	2.7	6.4	7.6	5.1	30.0	6.5	3.2	1.8