ASSOCIATION OF THE ACTN3 GENE'S SINGLE-NUCLEOTIDE VARIANT RS1815739 (R577X) WITH SPORTS QUALIFICATION AND COMPETITIVE DISTANCE IN CAUCASIAN ATHLETES OF THE SOUTHERN URALS Article Balberova O.V., Shnayder N.A., Bykov E.V., Zakaryukin Y.E., Petrova M.M., Soloveva I.A., Narodova E.A., Chumakova G.A., Al-Zami Mustafa, Asadullin A.R., Vaiman E.E., Trefilova V.V., Nasyrova R.F. Genes. MDPI. Vol. 14. 2023. 1512 p.