IEF takes place in a pH gradient and can only be used for amphoteric substances such as peptides and proteins. The charged molecules move toward the anode or the cathode until they reach a position in the pH gradient where their net charges are zero. This pH value is the “isoelectric point” (pI) of the substance.

TLS Online TPP Program

#Id: 7589

#Unit 5. Developmental Biology

Hyperactivation mediated by the opening of the sperm specific calcium channels, the CatSper proteins, in the sperm tail.

TLS Online TPP Program

#Id: 932

#Unit 5. Developmental Biology

A totipotent stem cell can generate all cell types of both embryonic and extraembryonic lineages. 

TLS Online TPP Program

#Id: 6932

#Unit 8. Inheritance Biology

hCONDELs - Responsible for the anatomical and behavioral differences between humans, chimpanzees and other varieties of mammals like ape or monkeys

TLS Online TPP Program

#Id: 10264

#Unit 6. System Physiology – Plant

DREB2A target genes are also induced by dehydration stress

TLS Online TPP Program

#Id: 9942

#Unit 4. Cell Communication and Cell Signaling

Diphtheria

Natural infection with C. diphtheriae occurs only in humans and is spread by respiratory droplets. 

The organism colonizes the nasopharyngeal tract and causes little tissue damage, with only a mild inflammatory reaction.