The second half of the distal tubule and the subsequent cortical collecting tubule have two distinct cell types:  principal cells and intercalated cells

TLS Online TPP Program

#Id: 1912

#Unit 4. Cell Communication and Cell Signaling

T1 cells are mIgMhi, mIgD -/lo, CD21-, CD23-, CD24+, and CD93+.  T2 cells differ from T1 cells in having higher levels of mIgD and in expressing CD21 and CD23.

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.

TLS Online TPP Program

#Id: 2357

#Unit 5. Developmental Biology

Clonogenic neoblasts can migrate to a wound site and regenerate the tissue.

TLS Online TPP Program

#Id: 4314

#Unit 11. Evolution and Behavior

Ockham’s principle- Principle of parsimony

TLS Online TPP Program

#Id: 4620

#Unit 13. Methods in Biology

Glycosphingolipids as determinants of blood groups.