Table 2. Genomic organization of human gamete-recognition genes including candidate sites under selection.

Genome coordinates and gene structure are those in the UCSC genome browser. Ancestral alleles were identified by comparison to reference genes for other great apes.

Gene	GRCh38/hg38 Coordinates	Number of exons	Number of codons	Candidate site under selection	Ancestral Allele	Derived Allele
C4BPA	chr1:207,113,026- 207,144,717	11	597	rs4844573 chr1:207,131,555 C4BPA 300	ACT Thr	ATT Ile
ZP3	chr7:76,424,965- 76,442,056	8	424	rs2906999 chr7:76,440,494 ZP3 315	CCG Pro	TCG Ser
ZP2	chr16:21,197,480- 21,211,547	19	745	rs2075520 chr16:21,211,351 ZP2 36	GTG Val	GGG Gly
ZP1	Chr11:60,867,562- 60,875,656	12	638	None