3 syllables: cy, to, chrome. Stress on cy.
SEYE-tuh-krohm
/ˈsaɪtəˌkroʊm/
cytochrome is pronounced SEYE-tuh-krohm (/ˈsaɪtəˌkroʊm/). It has three syllables (cy-to-chrome), with the stress on "cy". Cytochrome is a class of heme-containing proteins that facilitate electron transfer in biological redox reactions. They are essential components of cellular respiration and photosynthesis, often serving as terminal or intermediate electron carriers. In scientific contexts, the term refers to diverse enzymes and proteins with a heme or similar prosthetic group, involved in energy metabolism and metabolism-related processes.
Cytochrome is a class of heme-containing proteins that facilitate electron transfer in biological redox reactions. They are essential components of cellular respiration and photosynthesis, often serving as terminal or intermediate electron carriers. In scientific contexts, the term refers to diverse enzymes and proteins with a heme or similar prosthetic group, involved in energy metabolism and metabolism-related processes.
"The cytochrome c oxidase complex plays a crucial role in the mitochondrial electron transport chain."
"Researchers isolated cytochrome b from the photosynthetic apparatus to study its electron transfer properties."
"Cytochrome P450 enzymes participate in the metabolism of drugs and xenobiotics in the liver."
Pronounce as ˈsaɪ.təˌkroʊm in US and UK. Stress begins on the first syllable 'CY-to-' and then a secondary emphasis on '-chrome'. The sequence is two vowels per syllable: 'cy' as /ˈsaɪ/, 'to' as /tə/, and 'chrome' as /ˌkroʊm/. Keep the 'cy' diphthong crisp, the 'to' as a relaxed schwa, and finish with a long 'o' in 'chrome'. Audio guidance from standard pronunciation resources aligns with Forvo or Cambridge dictionary entries.
Two frequent errors: (1) stressing the second syllable too much by over-pronouncing 'to' rather than keeping it as a schwa /tə/. (2) Mispronouncing 'chrome' as /krɔːm/ with an open back vowel; aim for /kroʊm/ with a clear /oʊ/. Correct approach involves keeping the initial /ˈsaɪ/ intact, a light /tə/, and a long /roʊm/. Practice with slow, then normal tempo to balance: /ˈsaɪtəˌkroʊm/.
In US/UK, cytochrome is typically /ˈsaɪtəˌkroʊm/ with rhoticity affecting the /r/ in 'chrome' in rhotic accents. UK non-rhotic speakers may slightly soften the /r/ in 'chrome', but still preserve the /roʊm/. Australian pronunciation mirrors US/UK with a clear /oʊ/ in 'chrome' and a stable /ˈsaɪtə/. The main differences lie in rhotic quality and vowel length before /m/.
The difficulty lies in balancing the multisyllabic rhythm: a strong initial /ˈsaɪ/ followed by a reduced /tə/, and a final long /oʊ/ in /kroʊm/. Also, blending the /t/ of 'to' with the /k/ of 'chrome' can feel abrupt if not carefully sequenced. Beginners often compress syllables or misplace the main stress, but maintaining distinct syllables and a crisp /roʊm/ final helps clarity.
Yes, the middle consonant cluster 'cyt o' transitions into /t/ before /kroʊm/, so the sequence is best heard as /saɪ-tə-kroʊm/. The 'cyto' part may tempt learners to glide too quickly into 'chrome', so focus on segmenting the word into three clear parts: /ˈsaɪ/ /tə/ /kroʊm/ and avoid inserting an extra syllable or altering the vowel in /tə/.
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Cytochrome derives from the Greek cyto- meaning cell or container, and -chrome from chroma meaning color, referring to the colored heme-containing proteins initially observed in cells. The term emerged in the early 20th century as biochemists began classifying pigments linked to cellular respiration and photosynthesis. Early work by scientists like Karl Fischer and others identified cytochromes as distinct from chlorophyll and non-heme pigments. The naming convention reflects both the subcellular localization (cyto-) and the distinctive color changes as cytochromes cycle between oxidation states, a property central to their role in electron transfer. First use appears in the literature around the 1920s-1930s as spectroscopic methods revealed colored, iron-containing proteins within mitochondria and chloroplasts. Over time, the scope widened to include many families, such as cytochrome c, b, a, and P450, each with unique spectra, redox potentials, and biological roles, reinforcing the term as a broad functional class rather than a single enzyme. The word now appears in biochemistry, physiology, pharmacology, and molecular biology, frequently in discussions of electron transport chains, oxidative metabolism, and drug metabolism pathways.
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Words that rhyme with "cytochrome"
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