Table I.

Classification of 125 OsWAKs identified from rice genome of japonica cv Nipponbare

Gene Type	Domain Content	No. in Category
OsWAK-RLK	Both extracellular EGF-like domains and a cytoplasmic protein kinase domain	67
OsWAK-RLCK	Only cytoplasmic protein kinase domain with its amino acid identity ≥40% to a kinase domain of an OsWAK-RLK member	28
OsWAK-RLP	Only extracellular EGF-like domains	13
OsWAK short gene	No domain, protein sequence <300 amino acids but its amino acid identity ≥40% to a longer OsWAK protein	12
OsWAK pseudogene	Stop codons or frame shifts in coding region	5