Selenocysteine is incorporated into proteins with the aid of a tRNA that interprets the UGA Stop codon as a Sec codon. tRNASec is initially charged with serine in a reaction catalyzed by the same SerRS that charges tRNASer.

TLS Online TPP Program

#Id: 8272

#Unit 1. Molecules and their Interaction Relevant to Biology

A hydrogen bond is an intermolecular force (IMF) that forms a special type of dipole-dipole attraction when a hydrogen atom bonded to a strongly electronegative atom exists in the vicinity of another electronegative atom with a lone pair of electrons.

TLS Online TPP Program

#Id: 10176

#Unit 6. System Physiology – Plant

Conversely bioactive gibberellin and the GID1 receptor enhance DELLA repressor degradation, while GA2ox blocks DELLA repressor degradation

TLS Online TPP Program

#Id: 8454

#Unit 1. Molecules and their Interaction Relevant to Biology

The α helices of proteins have an average length of ∼12 residues, which corresponds to more than three helical turns, and a length of ∼18 A.

TLS Online TPP Program

#Id: 7245

#Unit 5. Developmental Biology

B- cell maturation

TLS Online TPP Program

#Id: 5452

#Unit 7. System Physiology – Animal

The relative refractory period begins at the end of the absolute refractory period and overlaps primarily with the period of the hyperpolarizing afterpotential.