The nucleosome consists of approximately equal masses of DNA and histones (including H1). The predicted mass of the nucleosome is 262 kD.

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#Id: 4824

#Unit 13. Methods in Biology

Null hypothesis is either rejected or not rejected based on the viability of the given population or sample.

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#Id: 9498

#Unit 6. System Physiology – Plant

HC toxin is a cyclic peptide. It is synthesized continuously

by two specific tetrapartite cyclic peptide synthetases

(HTS1 and HTS2) and then exported outside the fungal cell. 

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#Id: 2486

#Unit 13. Methods in Biology

Photodecomposition of riboflavin generates a free radical that initiates polymerization.

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#Id: 1646

#Unit 4. Cell Communication and Cell Signaling

Antibodies serve as physiological bridges between an antigen present on a pathogen, and the cells or molecules that will ultimately destroy it.

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#Id: 6878

#Unit 3. Fundamental Processes

PRC1 complex binds the methylated nucleosomes through dimeric Pc subunits (CBXs in mammals), each containing a methyl lysine–binding domain (called a chromodomain) specific for methylated H3 lysine 27. 

Binding of the dimeric Pc to neighboring nucleosomes is proposed to condense the chromatin into a structure that inhibits transcription.