Content of Glu, Pro and Gly were higher among 18 amino acid, 1st limited amino acid was Trp.Essential amino acid composition were resemble to adult requirement pattern of WHO.

• 头骨和脊骨蛋白质的氨基酸组成基本一致的，均有18种氨基酸，其中甘氨酸、谷氨酸和脯氨酸的含量较高，色氨酸为第一限制性氨基酸，必需氨基酸含量均接近或超过WHO推荐的成人氨基酸需要量模式。