The triterpenes are C30 terpenes and include squalene and lanosterol, two of the precursors of cholesterol

TLS Online TPP Program

#Id: 8189

#Section 3: Genetics, Cellular and Molecular Biology

C-terminal peroxisomal signal sequences Ser–Lys–Leu (PTS1)

N-terminal peroxisomal signal sequences slightly longer and partially hydrophobic (PTS2)

TLS Online TPP Program

#Id: 10333

#Section 2: General Biology

TLS Online TPP Program

#Id: 8038

#Section 2: General Biology

His ionisation series

1------pK1-----pKr--------pKr------14

TLS Online TPP Program

#Id: 10300

#Section 2: General Biology

T-Cell Activation and Differentiation

TLS Online TPP Program

#Id: 10291

#Section 2: General Biology

The second phase of T-cell development

1.Positive selection: Selection for those cells whose T-cell receptors engage self-MHC.

2.Negative selection: Selection against those cells whose T-cell receptors bind too strongly to self-peptide/MHC combinations.

3.Lineage commitment: Commitment of thymocytes to effector cell lineages, including CD4 helper or CD8 cytotoxic populations