SEX1 (STARCH EXCESS 1). Identical to Alpha-glucan water dikinase 1, chloroplast precursor (GWD1) [Arabidopsis Thaliana] (GB:Q9SAC6;GB:Q93VD0;GB:Q940Z0;GB:Q9FPP2); similar to ATGWD2/GWD3/PWD (PHOSPHOGLUCAN, WATER DIKINASE), ATP binding / kinase [Arabidopsis thaliana] (TAIR:AT4G24450.1); similar to starch associated protein R1 [Solanum tuberosum] (GB:AAK11735.1); similar to Alpha-glucan water dikinase, chloroplast precursor (Starch-related R1 protein) (GB:Q9AWA5); similar to Alpha-glucan water dikinase, chloroplast precursor (Starch-related protein R1) (GB:Q8LPT9); contains InterPro domain Pyruvate phosphate dikinase, PEP/pyruvate-binding; (In