6종 갑각류 껍질의 키틴 및 구성아미노산 함량

Chitin and amino acid contest of six species of crustacean shells

To obtain basic data about crustacean shell, chitin and amino acid content of six species of crustacean shells(Antarctic krill, Euphausia superba; Red snow crab, Chinonecetes japonicus, Daelongsuyum shrimp, Solenocera prominetis, Lobster, Linuparus trigonus; Gasibal shrimp, Nephrops thomsoni; Blue crab, Portunus trituberculatus) were investigated. The chitin content of six species of crustacean shells extracted by Hackman method ranged from 11.2 to 22.7% and that of the leg shell of red snow crab was the highest of them, holding 22.7%. But the chitin contained a small amount of protein, in the range of 0.5 to 3.1%. Total amino acid content of the six species of decalcified shells ranged from 55856.1 mg/100g to 30807.6 mg/100g (55856.1 mg/100g in antarctic krill shell, 37983.4 mg/100g in red snow crab shell, 41059.3 mg/100g in daelongsuyum shrimp shell, 36275.2 mg/100g in lobster shell, 33114.9 mg/100g in gasibal shrimp shell, and 30807.6 mg/100g in blue crab shell). The great portion of amino acids in these decalcified shells was occupied by aspartic acid, glutamic acid, and histidine. In the case of decalcified shell of gasibal shrimp, histidine was responsible for 59.8% of the total amino acid.