The body is usually divided into cephalothorax and abdomen . 体躯通常分为头胸部和腹部两部分。
2.
Bioinformatics methods are used to analyze and manage expressed sequence tags ( ests ) which are generated by large - scale sequencing of a cdna library from cephalothorax of a wild , female , adult chinese shrimp ( fenneropenaeus chinensis ) 本文运用生物信息学的方法，分析及管理由雌性成年中国对虾头胸部cdna文库经部分测序产生的10446条ests 。
3.
The first stage is characterized by the body becoming bigger and more elongated than in the nauplius stage ; the head and thorax , however , remain unchanged . during this stage direct heat and light from the sun is detrimental to the development of the larvae . under direct sunlight they become deformed and are unable to absorb nutrients 第一期，其形态特徵为体长比无节幼虫期大而伸长，头胸部与形态和前期同，此期最怕太阳直射，在太阳直射下，饲育的水蚤幼虫眼幼虫，身体弯曲成为畸形，不摄食。
4.
After careful studying their relative importance to immune response and the possibility of the match , seventeen sequences of interest were selected for further experiment , including estss analogous to 11 . 5kd antibacterial peptide , lysozyme , serine protease and its inhibitor , lectin , antifreeze protein , et al . primers designed according to the sequences were used to amplify the corresponding estss from both blood and cephalothorax cdna library 在仔细分析了它们在免疫系统中的重要性和在对虾中出现的可能性之后，从中选出了17条可能编码抗菌肽，溶菌酶，凝集素、丝氨酸蛋白酶及其抑制剂，抗冻蛋白等蛋白质的序列，以此为依据设计引物，在中国对虾的血液和头胸部cdna文库中扩增相应的序列。
