Rho-dependent terminators are defined by the need for addition of rho factor in vitro, and mutations show that the factor is involved in termination in vivo.

TLS Online TPP Program

#Id: 2504

#Unit 13. Methods in Biology

IEF is a highly sensitive analytical technique and is particularly useful for studying  microheterogeneity in a protein. For example, a protein may show a single band on an SDS gel but may show three bands on an IEF gel. This may occur, for example, when a protein exists in mono-, di- and tri-phosphorylated forms. 

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#Id: 578

#Unit 2. Cellular Organization

Mutants that cannot be expressed at all are called uninducible. Mutants that are continuously expressed are called constitutive mutants.

TLS Online TPP Program

#Id: 2110

#Unit 8. Inheritance Biology

Deletions are lethal in the homozygous state because all copies of any essential genes located in the deleted region are missing.

TLS Online TPP Program

#Id: 4972

#Unit 6. System Physiology – Plant

Examples of phenomena involved in this High Irradiance Response (HIR) include: 

• anthocyanin synthesis in seedlings and apple skins

• inhibition of hypocotyl elongation in mustard, lettuce and petunia

• plume hook opening in lettuce

• cotyledon enlargement in lettuce

• ethylene production in sorghum

TLS Online TPP Program

#Id: 8197

#Unit 2. Cellular Organization

Zellweger syndrome

Autosomal recessive Mutations in any of a dozen different peroxins, the most common being Pex1, cause an impairment in peroxisomal protein import.