Antigen can be detected or measured by a sandwich ELISA .In this technique, the antibody (rather than the antigen) is immobilized on a microtiter well. 

A sample containing antigen is added and allowed to react with the immobilized antibody. After the well is washed, a second enzyme- linked antibody specific for a different epitope on the antigen is added and allowed to react with the bound antigen

After any free second antibody is removed by washing, substrate is added, and the colored reaction product is measured.

TLS Online TPP Program

#Id: 4638

#Unit 6. System Physiology – Plant

Seedlings grown in the dark display an etiolated growth pattern:

a) yellow unexpanded cotyledons

b) apical hook

c) Long hypocotyl

TLS Online TPP Program

#Id: 2122

#Unit 8. Inheritance Biology

Inversions that do not include the centromere, are termed paracentric inversions

 

TLS Online TPP Program

#Id: 5569

#Unit 7. System Physiology – Animal

Meanwhile, hypotonic fluid  flows into the distal tubule, andisotonic and subsequently hypertonic fluid flows into the

ascending thick limb

TLS Online TPP Program

#Id: 8812

#Unit 6. System Physiology – Plant

Excitation of chlorophyll RC has four ways to dissipate energy

1. Heat

2. Fluorescence

3. energy transfer

4. Photochemistry via charge separation

TLS Online TPP Program

#Id: 10519

#Unit 4. Cell Communication and Cell Signaling

During apoptosis, increasing amounts of phosphatidylserine are found in the exoplasmic leaflet, where it acts as an “eat me” signal