SCLEROTIZED PROTEIN IN THE SHELL MATRIX OF A BIVALVE MOLLUSK
SCLEROTIZED PROTEIN IN THE SHELL MATRIX OF A BIVALVE MOLLUSK
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DOI：
10.1007/bf00387568
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发表时间：
1980-01-01
期刊：
影响因子：
2.4
通讯作者：
CARRIKER, MR
中科院分区：
文献类型：
--
作者：
GORDON, J;CARRIKER, MR
赖氨酸的ε-氨基和酪氨酸的酚基最集中在双壳类 Mercenaria Mercenaria 壳的新沉积的有机基质中。氧化L-二羟基苯丙氨酸的酚氧化酶仅存在于壳基质的这个新区域中。贝壳钙化分泌物的扫描电子显微照片显示，增生线被认为是分隔碳酸钙日间增生的有机基质层，直到贝壳物质沉积后 4 天才形成。壳基质可能通过某种聚合作用而硬化，并且基质中的赖氨酸和酪氨酸残基可能参与该过程。只有在聚合物完全硬化后，抛光和蚀刻部分的增生线才变得可见。
The epsilon-amino groups of lysine and phenolic groups of tyrosine are most heavily concentrated in the newly-deposited organic matrix of the shell of the bivalve Mercenaria mercenaria. A phenol oxidase enzyme which oxidizes L-dihydroxyphenylalanine is present only in this new area of the shell matrix. Scanning electron micrographs of calcified secretions of the shell show that accretion lines, thought to be layers of organic matrix separating diurnal accretions of calcium carbonate, are not developed until up to 4 days after deposition of shell material. The shell matrix probably is hardened by some kind of polymerization and lysine and tyrosine residues in the matrix may be involved in the process. Accretion lines in polished and etched sections become visible only after complete hardening of the polymer occurs.