McLean R J, Pessoney G F
J Cell Biol. 1970 Jun;45(3):522-31. doi: 10.1083/jcb.45.3.522.
A quasi-crystalline lamellar lattice was observed in chloroplasts of the filamentous green alga Zygnema. The lattice does not appear in the cells until cultures are at the end of the log phase of growth. Pseudograna are also present and become more numerous towards the middle of the log phase. The three-dimensional lattice superficially resembles the configuration of cubic prolamellar bodies but is about 10 times larger and is entirely different in internal structure. The lattice is composed of one or two appressed thylakoids in a stroma matrix which is bounded on each side by a single thylakoid membrane. This multilayered sandwich of membranes and matrix occupies a position equivalent to the single membrane of a cubic prolamellar body.
在丝状绿藻双星藻的叶绿体中观察到一种准晶层状晶格。直到培养物处于生长对数期末期，这种晶格才会出现在细胞中。假基粒也存在，并且在对数期中期数量变得更多。这种三维晶格表面上类似于立方原片层体的结构，但大约大10倍，并且内部结构完全不同。该晶格由基质中的一两个紧贴的类囊体组成，基质的每一侧都由单层类囊体膜界定。这种由膜和基质组成的多层夹心结构占据了与立方原片层体的单层膜相当的位置。
