Spider are apparently absent. In some species, the exocuticle of the legs and prosoma is modified by a tanning process, resulting in brown coloration. Bilins are found, for example, in "Micrommata virescens", resulting in its green color. Guanine is responsible for the white markings of the European garden spider "Araneus diadematus". It is in many species accumulated in specialized cells called guanocytes. In genera such as "Tetragnatha", "Leucauge", "Argyrodes" or "Theridiosoma", guanine creates their silvery appearance. While guanine is originally an end-product of protein metabolism, its excretion can be blocked in spiders, leading to an increase in its storage. Structural colors
Bernardinai Garden II, the Bernardine garden was destroyed. In the Soviet Union times it was reconstructed for the second time and named Jaunimo sodas (The Youth Garden). In 2013, the Bernardine garden was reconstructed for the third time. Reconstruction works were done by „Vilnius city parks“ and partly funded by the European Union. It is nowadays operational, and is known as one of the attractions in the Vilnius Old Town. The botanical exposition is a very special part of the park, where plants are sorted by groups and classes. They are planted in two types. The first type is from the lowest