The ter site is recognized by a unidirectional contrahelicase (called Tus in E. coli and RTP in B. subtilis) that recognizes the consensus sequence and prevents the replication fork from proceeding.

TLS Online TPP Program

#Id: 2867

#Unit 13. Methods in Biology

Cystine (Cys2) possesses a weak absorption maximum of similar strength as phenylalanine at 250 nm.

TLS Online TPP Program

#Id: 7368

#Unit 5. Developmental Biology

The transition from specification to determination in Drosophila is mediated by Segmentation genes.

TLS Online TPP Program

#Id: 1874

#Unit 10. Ecological Principles

α12>1 Species 2 have a greater inhibitory effect on individuals of species 1 than do the species 1 individuals themselves.

TLS Online TPP Program

#Id: 3725

#Unit 10. Ecological Principles

Berger-Parker index - Dominance indices are weighted toward the abundance of the commonest or dominant species
D_BP = N_max /N

TLS Online TPP Program

#Id: 6398

#Unit 2. Cellular Organization

Repression-Trp aporepressor dimer binds high tryptophan, changes conformation with high affinity for trp operator

Tryptophan is a corepressor