R.A. John

456 total citations
7 papers, 396 citations indexed

About

R.A. John is a scholar working on Biochemistry, Molecular Biology and Clinical Biochemistry. According to data from OpenAlex, R.A. John has authored 7 papers receiving a total of 396 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Biochemistry, 3 papers in Molecular Biology and 2 papers in Clinical Biochemistry. Recurrent topics in R.A. John's work include Amino Acid Enzymes and Metabolism (5 papers), Polyamine Metabolism and Applications (2 papers) and Enzyme function and inhibition (2 papers). R.A. John is often cited by papers focused on Amino Acid Enzymes and Metabolism (5 papers), Polyamine Metabolism and Applications (2 papers) and Enzyme function and inhibition (2 papers). R.A. John collaborates with scholars based in United Kingdom, Italy and Mexico. R.A. John's co-authors include L.J. Fowler, P. Fasella, Daniela De Biase, Francesco Bossa, Angela Tramonti, Jennifer A. Williams and Donatella Barra and has published in prestigious journals such as Biochemistry, Biochemical Journal and Biochemical Pharmacology.

In The Last Decade

R.A. John

7 papers receiving 351 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
R.A. John United Kingdom	7	195	134	120	94	56	7	396
Katsura Inoue Japan	13	344 1.8×	90 0.7×	157 1.3×	18 0.2×	30 0.5×	20	555
René Hummel Denmark	9	376 1.9×	79 0.6×	88 0.7×	32 0.3×	32 0.6×	13	466
G. Toschi Italy	14	353 1.8×	203 1.5×	28 0.2×	51 0.5×	95 1.7×	43	641
T. Schmidt‐Glenewinkel United States	14	632 3.2×	200 1.5×	130 1.1×	46 0.5×	89 1.6×	25	891
Joseph Lerner United States	17	259 1.3×	60 0.4×	225 1.9×	24 0.3×	129 2.3×	69	694
Guillermo H. Massieu Mexico	12	117 0.6×	188 1.4×	61 0.5×	61 0.6×	78 1.4×	13	319
Kiyoshi Matsuno Japan	16	576 3.0×	297 2.2×	26 0.2×	47 0.5×	88 1.6×	43	786
Christian Napias France	13	354 1.8×	249 1.9×	26 0.2×	73 0.8×	39 0.7×	25	531
N Popov Czechia	12	259 1.3×	231 1.7×	24 0.2×	53 0.6×	47 0.8×	31	468
Bruce E. Phillips United States	7	168 0.9×	69 0.5×	56 0.5×	42 0.4×	37 0.7×	8	367

Countries citing papers authored by R.A. John

Since Specialization

Citations

This map shows the geographic impact of R.A. John's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by R.A. John with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites R.A. John more than expected).

Fields of papers citing papers by R.A. John

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by R.A. John. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by R.A. John. The network helps show where R.A. John may publish in the future.

Co-authorship network of co-authors of R.A. John

This figure shows the co-authorship network connecting the top 25 collaborators of R.A. John. A scholar is included among the top collaborators of R.A. John based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with R.A. John. R.A. John is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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7 of 7 papers shown

1.

Biase, Daniela De, Angela Tramonti, R.A. John, & Francesco Bossa. (1996). Isolation, Overexpression, and Biochemical Characterization of the Two Isoforms of Glutamic Acid Decarboxylase fromEscherichia coli. Protein Expression and Purification. 8(4). 430–438. 90 indexed citations

2.

Biase, Daniela De, et al.. (1989). Stoichiometry and stability of the adduct formed between human 4-aminobutyrate aminotransferase and 4-aminohex-5-enoate: sequence of a labelled peptide. Biochimie. 71(4). 491–495. 9 indexed citations

3.

John, R.A., et al.. (1983). An investigation of the properties of ornithine aminotransferase after inactivation by the ‘suicide’ inhibitor aminohexynoate and use of the compound as a probe of intracellullar protein turnover. Biochemical Journal. 209(1). 243–249. 10 indexed citations

4.

Williams, Jennifer A., et al.. (1982). The reaction of ornithine aminotransferase with ornithine. Biochemical Journal. 201(1). 221–225. 26 indexed citations

5.

Fowler, L.J., et al.. (1975). An analysis of the kinetics of the inhibition of rabbit brain γ-aminobutyrate aminotransferase by sodium n-dipropylacetate and some other simple carboxylic acids. Biochemical Pharmacology. 24(13-14). 1267–1270. 48 indexed citations

6.

Fowler, L.J. & R.A. John. (1972). Active-site-directed irreversible inhibition of rat brain 4-aminobutyrate aminotransferase by ethanolamine O-sulphate in vitro and in vivo. Biochemical Journal. 130(2). 569–573. 154 indexed citations

7.

John, R.A. & P. Fasella. (1969). Reaction of L-serine O-sulfate with aspartate aminotransferase. Biochemistry. 8(11). 4477–4482. 59 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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