histone protein

phenotype nucleotide bio focus eukaryotic fingers generated drawing extra chromosomal genes circular nucleic acid guanine animal golgi biotech code molecules chloroplasts cycle cytosine chromatid backbone endoplasmic graphic chemistry chromatids centromere adenine biochemistry cilia infographic medical education research model sequence science nucleosome microscopic molecule anatomy double helix scientific h1 h3 h4 h2a h2b molecular chromatin evolution nucleus chromosome genetic genetics cell histone biological dna chromosomes gene biology protein deoxyribonucleic biotechnology proteins genome diagram structure medicine health spiral tail human vector