Most species of bacteria can be broadly divided into two groups, known as gram-positive and gram-negative. These categories ...

If the peptidoglycan layer is thin, it's classified as gram negative. Characteristics of Gram-Positive Bacilli. A gram-positive bacillus doesn't have an outer cell wall beyond the peptidoglycan ...

In gram positive bacteria, the large crystal violet-iodine complexes are then unable to penetrate and escape the thick peptidoglycan layer, resulting in purple stained cells. However, in gram negative ...

Now, scientists say the woman is the only known carrier of a new blood type called “Gwada negative.” It’s the only blood type within a new blood group system that scientists have dubbed “PigZ,” which ...

HER2-negative and HER2-positive are types of breast cancer that share some things in common but have plenty of differences, too. Which kind you have can affect the treatment you get.

The molecular markers CD4 and CD8—defining helper T cells and killer T cells, respectively—were once considered mutually exclusive. But "double positive" CD4+-CD8+ T cells have lately been ...

Gram-positive bacteria show blue or purple after Gram-staining in a laboratory test. They have thick cell walls. Gram-negative bacteria show pink or red on staining and have thin walls.