B cells migrate to the lymphoid follicles. They are directed there by chemokine interactions between CXCL13, which is secreted by follicular dendritic cells (FDCs).

TLS Online TPP Program

#Id: 8974

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 8223

#Section 3: Genetics, Cellular and Molecular Biology

Retromer

a coat protein complex specialized for endosome-to-TGN transport, recycle the M6P receptor to the TGN

TLS Online TPP Program

#Id: 8879

#Section 3: Genetics, Cellular and Molecular Biology

This combination of two positive feedback loops:

one that activates a CDK1 activator (Cdc25C)

one that inhibits a CDK1 inhibitor (Wee1)

results in the abrupt and irreversible transition from G2 into mitosis.

TLS Online TPP Program

#Id: 10358

#Section 2: General Biology

T-dependent response

Recognition of protein antigens and requires the participation of CD4 helper T cells

TLS Online TPP Program

#Id: 8959

#Section 3: Genetics, Cellular and Molecular Biology

Intimacy between the genomes of the mitochondria and the nucleus within a cell, it may not be surprising that extensive HGT has occurred between them