**1.1 Proteins with extracellular multiple LRR domains, a single TM domain (blue rectangle) positioned close to the carboxyl terminus and a short cytoplasmic tail**

NP\_190892;AT3G53240; Receptor Like Protein 45, Protein Binding

participate in protein-protein interactions but which have different functions and cellular locations. In each case, the protein is presented below, in an order guided by a Clustal X arrangement (http:www.clustal.org/) and is labeled by its NCBI (http://www.ncbi.nlmn.nih. gov/protein) protein identification number, followed by its chromosomal locus tag, in diagram

**1.1 Proteins with extracellular multiple LRR domains, a single TM domain (blue rectangle) positioned close to the carboxyl terminus and a short cytoplasmic tail** 

form as given by SMART (http://smart.embl-heidelberg.de).

NP\_177558;AT1G74180;Receptor Like Protein 14; Protein Binding

NP\_180117;AT2G25470;Receptor Like Protein 21; Protein Binding (NP\_199740, NP\_177558 and NP\_180117 display 60% AA identity.)

NP\_177559;AT1G74190; Receptor Like Protein 15; Protein Binding

NP\_177557;AT1G74170; Receptor Like Protein 13; Protein Binding

NP\_190892;AT3G53240; Receptor Like Protein 45, Protein Binding

NP\_199740;AT5G49290; Protein Binding

NP\_176115;AT1G58190; Receptor Like Protein 9, Protein Binding

NP\_178125:AT1G80080; TMM (Too Many Mouths); Protein Binding/Receptor. (Note: This protein promotes cell fate progression in stomatal development of stems (Bhave et al.,2009)).

P\_176717;AT1G65380; Clavata 2; Protein Binding /Receptor Signaling Protein. (This protein forms a distinct CLE binding receptor complex regulating stem cell specification (Guo et al.,2010)).

NP\_188941; AT3G23010; Receptor Like Protein 36 (Disease Resistance Protein)

NP\_187188; AT3G05370; Receptor Like protein 31; Protein Binding

NP\_177296; AT1G71400; Receptor Like Protein 12; Protein Binding

NP\_567412;AT4G13920; Receptor Like Protein 50; Protein Binding

The LRR and TM Containing Multi-Domain Proteins in Arabidopsis 81

**1.2 Proteins with one single TM domain positioned at the amino terminus and another** 

NP\_198058:AT5G27060; Receptor Like Protein 53; protein binding

NP\_187216;AT3G05650: Receptor Like Protein 32; protein binding

NP\_188953;AT3G23120; Receptor Like Protein 38; protein binding:

NP\_188952;AT3G23110; Receptor Like Protein 37; protein binding

NP\_187187;AT3G05360; Receptor Like Protein 30; protein binding

NP\_177295;AT1G71390; Receptor Like Protein 11; protein binding

NP\_175225;AT1G47890; Receptor Like Protein 7; protein binding. Note: NP\_175225 possesses two TM domains at the AA terminus. ( NP\_198058, NP\_187216 and NP\_175225 **one close to the carboxyl terminus** 

exhibit 44 % AA identity.)

NP\_197963; AT5G25910; Receptor Like Protein 52; Protein Binding (Note: It is a putative disease resistance protein induced e.g. by chitin oligomers (Ramonell et al., 2005)).

NP\_187719;AT3G11080; Receptor Like Protein 35; Protein Binding

NP\_187712;AT3G11010; Receptor Like Protein 34; Protein Binding

NP\_189531;AT3G28890; Receptor Like Protein 43; Protein Binding

NP\_187217;AT3G05660; Receptor Like Protein 33; Protein Binding

NP\_179112;AT2G15080; Receptor Like Protein 19; Protein Binding

Note: It is possible that the primary function of most – if not of all – of the proteins listed above is to provide disease resistance.

NP\_197963; AT5G25910; Receptor Like Protein 52; Protein Binding (Note: It is a putative disease resistance protein induced e.g. by chitin oligomers (Ramonell et al., 2005)).

NP\_187719;AT3G11080; Receptor Like Protein 35; Protein Binding

NP\_187712;AT3G11010; Receptor Like Protein 34; Protein Binding

NP\_189531;AT3G28890; Receptor Like Protein 43; Protein Binding

NP\_187217;AT3G05660; Receptor Like Protein 33; Protein Binding

NP\_179112;AT2G15080; Receptor Like Protein 19; Protein Binding

provide disease resistance.

Note: It is possible that the primary function of most – if not of all – of the proteins listed above is to
