Vertebrates have three homologues of the Drosophila hedgehog gene: sonic hedgehog (shh), desert hedgehog

(dhh), and indian hedgehog (ihh)

TLS Online TPP Program

#Id: 1722

#Unit 4. Cell Communication and Cell Signaling

The α chains of the FcεRI, members of the immunoglobulin superfamily, directly bind the IgE heavy chains, whereas the β and γ chains are responsible for signal transduction.

TLS Online TPP Program

#Id: 4113

#Unit 6. System Physiology – Plant

Rubisco-activase elicits a conformational change of rubisco that reduces its binding affinity for sugar phosphates and activates it.

TLS Online TPP Program

#Id: 1218

#Unit 7. System Physiology – Animal

When extracellular Ca2+ concentration is increased  Ca2+ binds to the receptor  activates phospholipase C inhibits PTH secretion.

TLS Online TPP Program

#Id: 5255

#Unit 7. System Physiology – Animal

The heart consists of two kinds of muscle cells:

Contractile cells

Conducting cells

TLS Online TPP Program

#Id: 7061

#Unit 3. Fundamental Processes

Changes in the genetic code in bacterial or eukaryotic nuclear genomes usually assign amino acids to stop codons or change a codon so that it no longer specifies an amino acid.