Humans and most mammals long ago ceased producing 9 of the 20 amino acids needed for protein biosynthesis. These are instead acquired from the diet and microbiota. Most cells of the immune system ...

The volume of nucleolar material per nucleus and the activity of RNA polymerase I (RNA nucleotidyltransferase I) become doubled in the liver cells of rats that are fed for several days a diet that ...

Amino acids are the building blocks of life. We obtain them from the food we eat, and the body uses them to make proteins, which in turn are used for growth, development, and a multitude of other ...

Tiny differences in five amino acids in HLA-B, a protein, are linked to whether people can control levels of HIV (human immunodeficiency virus) with just their immune systems, an international team of ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...