Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At4g11720	Required for male fertility.	Arabidopsis HAP2 (GCS1) is a sperm-specific gene required for pollen tube guidance and fertilization.; 2006; DOI: 10.1242/dev.02683; PMID: 17079265; https://pubmed.ncbi.nlm.nih.gov/17079265/ | HAP2(GCS1)-dependent gamete fusion requires a positively charged carboxy-terminal domain.; 2010; DOI: 10.1371/journal.pgen.1000882; PMID: 20333238; https://pubmed.ncbi.nlm.nih.gov/20333238/ | The functional domain of GCS1-based gamete fusion resides in the amino terminus in plant and parasite species.; 2010; DOI: 10.1371/journal.pone.0015957; PMID: 21209845; https://pubmed.ncbi.nlm.nih.gov/21209845/ | Egg cell-secreted EC1 triggers sperm cell activation during double fertilization.; 2012; DOI: 10.1126/science.1223944; PMID: 23180860; https://pubmed.ncbi.nlm.nih.gov/23180860/ |  Arabidopsis  HAP2/GCS1 is a gamete fusion protein homologous to somatic and viral fusogens.; 2017; DOI: 10.1083/jcb.201610093; PMID: 28137780; https://pubmed.ncbi.nlm.nih.gov/28137780/
Arabidopsis	At3g19760	ATP-dependent RNA helicase.	No verified direct reference in this release
Rice	Os01g0639100	ATP-dependent RNA helicase.	No verified direct reference in this release
Rice	Os03g0566800	ATP-dependent RNA helicase.	Two highly similar DEAD box proteins, OsRH2 and OsRH34, homologous to eukaryotic initiation factor 4AIII, play roles of the exon junction complex in regulating growth and development in rice.; 2016; DOI: 10.1186/s12870-016-0769-5; PMID: 27071313; https://pubmed.ncbi.nlm.nih.gov/27071313/