Of lamprey

Melanocortins were identified in common ancestors of lampreys and gnathostomes over 700 million years ago and are little changed throughout evolution. They... 

Sediments and biota collected from the Hersey River, Michigan, in 1978, were heavily contaminated with phenanthrene, benz[a]anthracene, and benzo[a]pyrene when compared to a control site. Elevated PAH concentrations were recorded in sediments, whole insect larvae, crayfish muscle, and flesh of lampreys (family Petromyzontidae), brown trout (Salmo trutta), and white suckers (Catostomus commersoni), in that general order (Black et al. 1981). The polluted collection locale was the former site of a creosote wood preservation facility between 1902 and 1949, and, at the time of the study, received Reed City wastewater treatment plant effluent, described as an oily material with a naphthalene-like odor (Black et al. 1981). In San Francisco Bay, elevated PAH concentrations in fish livers reflected elevated sediment PAH concentrations (Stehr et al. 1997). In Chesapeake Bay, spot (Leiostomus xanthurus) collected from a PAH-contaminated tributary (up to 96 mg PAHs/kg DW sediment) had elevated cytochrome P-450 and EROD activity in liver and intestine microsomes (Van Veld et al. 1990). Intestinal P-450 activity was 80 to 100 times higher in fish from highly contaminated sites than in conspecifics from reference sites intestinal EROD activity had a similar trend. Liver P-450 and EROD activity was about 8 times higher in spot from the contaminated sites when compared to the reference sites. Liver P-450 activity correlated positively with sediment PAH, but intestinal P-450 activity seemed to reflect dietary exposure (Van Veld et al. 1990). The poor correlation between hepatic concentrations of PAHs and P-4501A is attributed to the rapid metabolism of these compounds (van der Weiden et al. 1994). 

Hendrickson, W. A., et al. (1988). Crystallographic structure analysis of lamprey hemoglobin from anomalous dispersion of synchrotron radiation. Proteins 4, 77-88. 

Escriva H, Manzon L, Youson J, Laudet V. Analysis of lamprey and haghsh genes reveals a complex history of gene duplications during early vertebrate evolution. Mol Biol Evol 2002 19 1440-1450. 

Lampreys and hagfishes are unusual, jaw-less fish that comprise the order Cyclostomata, so named because of the circular shape of the mouth. The 41 species of lampreys are in the superfamily Petromyzontoidea,... 

Lampreys also use their disk-mouths to hold onto rocks to stabilize themselves in moving water, and to move pebbles while digging their nests in a stream. The name of the common genus of lampreys, Petromyzon, translates as stone sucker from the Greek. 

With the exception of lamprey serum albumin. See Table I for albumin abreviations. 

Wickelgren WO, Leonard JP, Grimes MJ, Clark RD (1985) Ultrastructural correlates of transmitter release in presynaptic areas of lamprey reticulospinal axons. J Neurosci 5 1188-1201. 

The lamprey is a primitive jawless (agnathan) vertebrate fish and recently it has been shown that HoxL6 gene is expressed in the mandibular arch of developing embryos and that it co-localizes with Dlx, a marker of lamprey neural crest cells... 

Rogozin IB, Iyer LM, Liang L, Glazko GV, Liston VG, Pavlov YI. Evolution and diversification of lamprey antigen receptors evidence for involvement of an AID APOBEC family cytosine deaminase. Nat Immunol. 2007 8 647-56. 

Mallatt, J. and Sullivan, J. (1998) 28S and 18S rDNA sequences support the monophyly of lampreys and hagfishes . Molecular Biology and Evolution, 15, 1706-18. 

The relationship of lampreys to hagfishes a spectral analysis of ribosomal DNA sequences... 

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