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The thylakoids of cryptomonads are unique in that their lumens are filled with an electron-dense substance postulated to be phycobiliprotein. In this study, we used an antiserum against phycoerythrin (PE) 545 of Rhodomonas lens (gift of R. MacColl, New York State Department of Health, Albany, NY) and protein A-gold immunoelectron microscopy to localize this light-harvesting protein in cryptomon...

Cryptophytes are unicellular photosynthetic algae that use a lumenally located light-harvesting system, which is distinct from the phycobilisome structure found in cyanobacteria and red algae. One of the key components of this system is water-soluble phycoerythrin (PE) 545 whose expression is enhanced by low light levels. The crystal structure of the heterodimeric alpha(1)alpha(2)betabeta PE 54...

1 Beck-Sague C, Dooley SW, Hutton MD, et al. Hospital outbreak of multidrug-resistant Mycobacterium tuberculosis infections: factors in transmission to staff and HIV-infected patients. JAMA 1992; 268:1280-86 2 Pierce JR, Sims SL, Holman GH. Tranasmission oftuberculosis to hospital workers by a patient with AIDS. Chest 1992; 101:581-82 3 Centers for Disease Control and Prevention. Nosocomial tra...

Cyberbullying often occurs in group-based situations; therefore, how young people respond when they witness cyberbullying is important the process of combating issue. This study examined perceive severity incidents and as a bystander according to different factors associated with (i.e., publicity, anonymity, type, victim response). The final sample was 990 (545 female, 403 male, 42 non-disclose...

Introduction: Breastfeeding is an important principle in pediatric health. It decreases their mortality and protect them fromm diseases in the first 6-month of life. This study aimed to determined Maternal Knowledge and practice in Mashhad City about Breast-feeding in first 6 -month of Infant's life.   Materials and Methods: This Analytic study was conducted on 105 mothers who had a child ...

Ball, Goodwin, and Morton (1946) have reported that vitamin A(1) in contact with solid manganese dioxide is transformed slowly into a substance which displays spectroscopic properties of retinene(1). The latter is known to be the precursor of vitamin A(1) in the rhodopsin cycle of the retinal rods. The synthetic product is here referred to as "retinene(1)." In the present experiments this obser...