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DNA methylation is the main epigenetic modfication of DNA. Methylation can change the activity of a DNA segment. The DNA methyl transferase I (light blue) transfers a methyl group from S-adenosyl methionine (red) mostly to cytosine bases of the human DNA. Source: PDB entry 3pt6

Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer,lipid bi-layer cell anatomy

3D cartoon and Gaussian surface models, PDB 6vg8, white background

A space-filling molecular model of collagen, a fibrous protein that provides structural support in animals. It has a distinctive triple helix structure. Isolated on black.

Collagen protein molecule. Molecular model. 3D rendering. Illustration

Molecular model of Thymine, 1 of 4 nucleobases to form DNA

Indoleamine 2,3 dioxygenase 1 (IDO1) protein. Tryptophan catabolic enzyme of the kynurenine pathway. 3D illustration.

Artificial molecular structure in many colors. Horizontal composition, isolated on white background.

Avibactam is a diazobicyclooctane inhibitor of gram-negative and gram-positive bacteria. Avibactam (red) inhibits the bacterial enzyme beta-lactamase (blue) of Clostridioides difficile.

Infinity sign made out of multiple spheres and circular shapes against grey background.

3D cartoon and Gaussian surface models, PDB 7bg9, white background.

Taq polymerase PCR enzyme: a heat-stable DNA polymerase protein that is the key component that makes the polymerase chain reaction (PCR) possible, which is essential for DNA cloning and sequencing

$Serratia Marcescens is a rare Nosocomial Pathogen.\nThis bacterium is a gram-negative bacillus found in soil and water. it produces a red pigment at room temperature. It can cause urinary and respiratory infections, endocarditis, osteomyelitis, septicemia, wound infections, eye infections, and meningitis.$

DNA mutation, a mutation is a change in a DNA sequence, mutations can result from DNA copying mistakes made during cell division.

$Organic objects form a triangle. Artificial space incorporating organic materials.\nThis work was policy within one month. It is also an original work for this brief and cannot be used elsewhere.$

RecBCD is an enzyme of E. coli that initiates recombinational repair in DNA (orange). Two domains are depicted partially transparent to show the unfolded DNA strands. Source: PDB entry 6SJB

29 October Republic Day of Türkiye text on a red shiny sphere with a partial Turkish flag on white background. Easy to crop for all your print sizes and social media needs.

3D cartoon and Gaussian surface models, PDB 7s03, white background

Glucose-6-phosphate dehydrogenase (G6PD) protein. Enzyme of the pentose phosphate pathway that generates co-enzyme NADPH. 3D illustration.

A ball and stick model of a Polytetrafluoroethylene molecule, also known as PTFE or most commonly Teflon. It is a polymer consisting of only carbon and fluorine atoms. It is used as a non-stick coating for cookware, as a lubricant, and it is also used to contain highly reactive chemicals as it is extremely non-reactive.

Isolated cholesterol molecule between phospholipid molecules membrane 3d rendering

Cytochrome P450 molecule. CYP 3A4 is the most promiscuous of the human CYP enzymes. Molecular model. 3D rendering. Illustration

Lactose-negative biofilm-forming Enterobacter cloacae, resistant to multiple drugs. Enterobacter cloacae is a member of the normal gut flora. These bacteria are responsable for many hospital-acquired infections for which the mortality rate is generally high.

3D cartoon and Gaussian surface models, PDB 6gu2, white background

3D rendering of microscopic particles and bubbles

Calmodulin is an intracelular target of calcium ions. Once activated by Ca2+ (red), calmodulin interacts with various target proteins such as kinases and phosphatases.. It plays an important role in long-term memory. and muscle contraction. CaM has 4 calcium binding sites. PDB entry 3CLN, 1CFD

Big data. Information concept. 3D render

Free Images: "bestof:PDB 3c5g EBI.png All alpha proteins SAM domain-like DNA polymerase beta N-terminal domain-like DNA polymerase beta N-terminal domain-like DNA polymerase lambda"

Hylaeus_ornatus,_F,_Side1,_MD,_Dorchester_County_2015-09-17-10.58.21_ZS_PMax_UDR.jpg

bee_dna_extraction_132,_praz,_f,_angle,_mexico_2014-08-07-12.54.42_ZS_PMax.jpg

Megachile_species,_m,_south_africa,_kruger_2016-12-08-17.03.jpg

Megachile_species,_m,_south_africa,_kruger,_side_2016-12-08-17.15.jpg

Megachile_species,_m,_south_africa,_kruger,_back_2016-12-08-17.10.jpg

Melissodes_near_bimaculatus,_f,_virginia,_pulaski_county,_face_2016-12-16-13.40.jpg

Melissodes_near_bimaculatus,_f,_virginia,_pulaski_county,_side_2016-12-16-13.52.jpg

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Andrena_israel,_f,_israel,_side_2014-10-11-16.03.18_ZS_PMax.jpg

Andrena_israel,_f,_israel,_face_2014-10-11-15.48.31_ZS_PMax.jpg

Andrena_israel,_f,_israel,_back_2014-10-11-15.38.59_ZS_PMax.jpg

Lasioglossum_taylorae,_F,_Back,_MA,_Franklin_County_2015-07-07-11.55.17_ZS_PMax_UDR.jpg

Ruby_2015-08-07-18.04.36_ZS_PMax_UDR.jpg

Southern_armyworm,_side_2014-06-04-19.05.49_ZS_PMax.jpg

Andrena_perplexa,_m,_talbot,_md,_faceside_2015-05-17-16.08.22_ZS_PMax.jpg

Andrena_perplexa,_m,_talbot_co,_face_2015-05-17-15.58.10_ZS_PMax.jpg

Andrena_perplexa,_talbot,_m,_face3_2015-05-17-16.13.02_ZS_PMax.jpg

Coelidiana_undata,_m,_brazil_2016-02-23-11.57.jpg

Lasioglossum_desertum,_f,_ut,_garfield,_back_2015-06-12-18.59.04_ZS_PMax_UDR.jpg

Lasioglossum_desertum,_f,_ut,_garfield,_face_2015-06-12-19.04.08_ZS_PMax_UDR.jpg

Lasioglossum_taylorae,_F,_Face,_MA,_Franklin_County_2015-07-07-12.07.10_ZS_PMax_UDR.jpg

Beetle_from_Spatterdock,_back,_Upper_Marlboro_2013-10-08-19.54.02_ZS_PMax.jpg

Megachile_mendica,_m,_face,_prince_george's_co,_md_2016-04-19-10.57.jpg

Megachile_mendica,_m,_side,_prince_george's_co,_md_2016-04-19-11.11.jpg

Osmia_georgica,_m,_right_side,_Maryland_2016-06-27-18.10.jpg

Tibicen_tibicen,_Cicada,_face,_md,_upper_marlboro,_pg_county_2014-09-02-11.56.49_ZS_PMax.jpg

Wasp,_U,_Face,_MD,_Wicomico_County,_Groundworks_Farm_2015-08-25-15.56.40_ZS_PMax_UDR.jpg

Lasioglossum_taylorae,_F,_Side,_MA_Franklin_County_2015-07-07-12.48.53_ZS_PMax_UDR.jpg

Tibicen_tibicen,_Cicada,_back,_md,_upper_marlboro,_pg_county_2014-09-02-11.54.18_ZS_PMax.jpg

Tibicen_tibicen,_Cicada,_face2,_md,_upper_marlboro,_pg_county_2014-09-02-12.11.53_ZS_PMax.jpg

bee_species_cutout_antennae,_m,_mexico,_face_2014-08-08-11.50.35_ZS_PMax.jpg

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Grasshopper_nymph,_upper_marlboro_2016-10-23-19.23.jpg

Svastra_obliqua,_m,_back,_Dorchester_Co_2015-12-03-11.21.jpg

Coelioxys_alternata,_F,_Side,_Virginia,_Franklin_County_2014-12-05-16.17.57_ZS_PMax.jpg

China_Bee_1,_U,_Side_2015-08-10-09.58.58_ZS_PMax_UDR.jpg

Ctenocolletes_smaragdinus,_f,_australia,_side_2014-08-08-13.53.31_ZS_PMax.jpg

Lasioglossum_lilliputense,_F,_Face,_WY,_Teton_County_2015-06-08-15.30.48_ZS_PMax.jpg

Hylaeus_verticalis,_M,_side,_Michigan,_Keweenaw_County_2014-11-25-10.56.jpg

(beetle),_Back,_Judelot_Farm,_Maryland_2014-10-20-14.30.jpg

bee_species,_f,_side,_argentina_2014-08-07-15.38.54_ZS_PMax.jpg

ant,_dod,_pomonkey_2015-05-24-19.10.54_ZS_PMax.jpg

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Andrena_nubecula,_F,_Face_ammonia,_MD,_Anne_Arundel_County_2014-02-21-17.13.59_ZS_PMax.jpg

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Velvet_Ant,_F,_Back,_Hot_Springs_Village,_AR_2015-08-20-16.24.57_ZS_PMax_UDR.jpg

Lasioglossum_occidentale,_F,_Face,_WY,_Lincoln_County_2015-07-07-13.42.10_ZS_PMax_UDR.jpg

Velvet_Ant,_F,_Side,_Hot_Springs_Village,_AR_2015-08-20-15.39.20_ZS_PMax_UDR_copy.jpg

Velvet_Ant,_F,_Stinger,_Hot_Springs_Village,_AR_2015-08-20-16.49.58_ZS_PMax_UDR.jpg

Coelioxys_moesta,_F,_Side,_MI,_Keweenaw_County_2014-04-11-11.27.27_ZS_PMax.jpg

copper_oxide,_Helen_Folger_2015-08-07-13.52.41_ZS_PMax_UDR.jpg

Megachile_albisecta,_F,_Back,_Greece,_Aegean_Islands,_Lesvos,_Mytilene_2015-03-10-11.45.31_ZS_PMax.jpg

Megachile_inermis,_female,_back_2012-07-13-17.42.jpg

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Hypanthidioides_arenaria,_f,_back,_brazil_2014-08-05-22.39.13_ZS_PMax.jpg

Fluorite,_Helen_Folger,_with_foil_2015-08-07-17.50.41_ZS_PMax_UDR.jpg

Hylaeus_sp,_F,_Face,_Puerto_Rico,_Yauco_2015-01-30-14.36.57_ZS_PMax.jpg