| GO term | GO name | GO namespace | GO def |
| GO:0005515 | protein binding | molecular_function | Binding to a protein. [GOC:go_curators] |
| GO:0007283 | spermatogenesis | biological_process | The developmental process by which male germ line stem cells self renew or give rise to successive cell types resulting in the development of a spermatozoa. [GOC:jid, ISBN:9780878933846, PMID:28073824, PMID:30990821] |
| GO:0007342 | fusion of sperm to egg plasma membrane involved in single fertilization | biological_process | The binding and fusion of a sperm, with the plasma membrane of the oocyte as part of the process of single fertilization. In sperm with flagella, binding occurs at the posterior (post-acrosomal) region of the sperm head. [GOC:dph, GOC:jl, http://arbl.cvmbs.colostate.edu/hbooks/pathphys/reprod/fert/fert.html] |
| GO:0030154 | cell differentiation | biological_process | The cellular developmental process in which a relatively unspecialized cell, e.g. embryonic or regenerative cell, acquires specialized structural and/or functional features that characterize a specific cell. Differentiation includes the processes involved in commitment of a cell to a specific fate and its subsequent development to the mature state. [ISBN:0198506732] |
| GO:0031965 | nuclear membrane | cellular_component | Either of the lipid bilayers that surround the nucleus and form the nuclear envelope; excludes the intermembrane space. [GOC:mah, GOC:pz] |
| GO:0009566 | fertilization | biological_process | The union of gametes of opposite sexes during the process of sexual reproduction to form a zygote. It involves the fusion of the gametic nuclei (karyogamy) and cytoplasm (plasmogamy). [GOC:tb, ISBN:0198506732] |