In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Notably, one of these entities is absent in the Leishmania mexicana GPI8 protein, and abnormally low numbers of pericytes occur if one is missing from PDGF. Binding of 14-3-3 proteins to GABAB ["Gabba-sub-bee"] receptors does not occur when two arginines are mutated to alanine in one of these entities, which also binds to the COPI complex. They are usually C-terminal signals, and a common mammalian one consists of the amino acids lysine, aspartate, gluatamate, and leucine, or KDEL. hnRNP C proteins contain one of them that allows them to override nuclear export signals. For 10 points, name these signals important in directing proteins to the correct membranes, most often used to prevent a protein's export from the endoplasmic reticulum. 
Science

This work cites Proudhon's Philosophy of Poverty as an example of a form of a philosophy to which it claims economists, philanthropists, and humanitarians belong. Its second section advocates a ten-point program which calls for the establishment of industrial armies as well as free education for all children in public schools. That section follows one which examines the history of the (*) bourgeoisie and the proletarians and claims that the history of society is a history of class warfare. For ten points, name this work authored by Friedrich Engels and Karl Marx, which discusses how the problems of capitalism would be solved by adopting socialism and eventually the title ideology.
Social Science

This man designed a hotel named after the person who designed the street layout of Washington D.C. This creator of the L'Enfant Plaza Hotel designed a building whose glass windows kept falling off, his Hancock Tower. This main divided a trapezoidal plot into two triangles for his work on the National Gallery's [*] East Building. This man designed a cylindrical performance hall and overlapping pyramids for the Rock and Roll Hall of Fame. This architect was commissioned by Mitterrand to build a glass and steel object in front of a French museum. For 10 points, name this Chinese-American architect who designed the pyramid at the Louvre.

Fine Arts