Figure 5.
Schematic structure of SLG and SRK. SLG is an S allele-specific secreted glycoprotein, having a hydrophobic signal peptide in the N-terminus and 12 cysteine residues at the C-terminus. SRK is a receptor protein kinase, whose extracellular domain (receptor domain) is similar to SLG. SRK consists of a signal peptide, an SLG-like domain (S-domain), a hydrophobic transmembrane domain and a cytoplasmic catalytic domain (kinase domain) of the serine/threonine protein kinase type.