Abstract
A culture of HeLa cells was subjected to concurrent and consecutive dichromatic irradiation with visible light of various wavelengths. Consecutive dichromatic irradiation in the sequence 760 nm+633 nm was found to stimulate the synthesis of DNA in the cells and that in the sequence 633 nm+760 nm to inhibit it. These effects reached their maxima when the time interval between the successive irradiation events came to (1⋎3) min. On the strength of these data it is supposed that in HeLa cells there may exist a photochromic, photoreversible pigment similar to photochrome. Based on the results of dichromatic irradiation with blue and red light, flavoproteins are being discussed as likely photoreceptors.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
